Episode guide

"Bloodlines" is the sixth episode of the second season of Young Justice, and the 32nd of the overall series. It aired on June 2, 2012.


An intruder mysteriously appears inside Mount Justice, claiming to be a tourist from the future. But who is he really? And what is his true agenda?[1]


In a world darkened by ash rain, a bald man checks up on a brown-haired boy, who's working on a machine. The man wishes he could come along, but the machine only seats one.

Mount Justice
February 28, 10:07 EST
Impulse arrives

Impulse arrives in 2016.

Nightwing examines Krolotean data as Robin and Beast Boy enter, greeting him. Nightwing explains that the Kroloteans were looking for something inside their human captives that the nearest English translation for is "Meta-Gene", and no one knows what that means. The computer detects an energy impulse, and in a ball of lightning, a machine appears in the room. The boy from before comes out, and takes the name "Impulse" after Beast Boy identifies the machine as the cause of the impulse.

Impulse runs amok in the Cave, and Nightwing sends the two junior members after him. He first loses Beast Boy in the showers, and then Robin in the kitchen. He runs back to the Mission Room, and thinks he's outsmarted Nightwing's marbles on the floor. As he relaxes, Nightwing flanks him and subdues him. He is given cuffs on his wrists and ankles.

Beast Boy questions Impulse

Beast Boy questions the visitor from the future.

Impulse introduces himself as Bart Allen, but his claims, that he is from the future and the grandson of Flash, are initially not believed. Nightwing gives him a glass of water, but Impulse knows that he only wants his DNA. He freely offers it, and "spoils" the secret identities of Robin and Nightwing to Beast Boy to prove he's really from the future.

Mal arrives, giving Impulse the cue to break free and escape. Beast Boy transforms into a peregrine falcon and gives chase, though Nightwing and Robin doubt he'll keep up. It would not be necessary, as Nightwing had taken the precaution of placing a subcutaneous micro-tracker in the water, and traces it to find that Impulse is making a bee line toward Central City. This leads Nightwing to call and ask someone for help.

February 28, 23:14 BT

Cheshire and Red Arrow are standing on ledge across from the building they need to enter. Red Arrow is skeptical of Cheshire's motives, given that the "good guys" have been searching for the real Roy Harper for years and Cheshire suddenly has a lead. Cheshire counters this by saying that she goes where good guys won't. She says that Lian needs Red Arrow to put his "Real Roy guilt" behind him to be able to be a good father to her. Roy checks up on Lian, who's safe and warm in Jade's backpack.

Lian is happy

Lian is happy over Red Arrow and Cheshire's violence.

They then proceed to break into their destination with Arrow sliding down a zip-line, knocking the guard out, and Cheshire following afterwards. They continue to break through their enemies' defences, but after knocking several guards out, Lian blows their cover by cheering. This causes guards to surround them and Arrow to quickly pipe up that they should have left her with Cheshire's sister.

Central City
February 28, 12:03 CST
Impulse greets Wally

Impulse hugs Wally.

Barry, Iris, Joan and Jay are celebrating Joan and Jay's 70th wedding anniversary when Barry gets a phone call telling him about Impulse. Impulse promptly arrives at the house, proclaiming that he is Barry's grandson and proceeds to hug everyone in the room. Barry refuses to believe it because he and Iris don't even have kids. Iris cuts him off by saying that she's pregnant—she found out this morning—causing Impulse to say hello to his unborn dad and aunt. The revelation that there would be twins coming shocks Barry and Iris. Wally arrives, causing confusion and surprise in the house guests. He remedies this by saying that Nightwing gave him a call. At finding out who Wally is, Impulse hugs him.

A phone rings and Barry, thinking it is his, checks his phone. It turns out that it is Iris's phone and Impulse, knowing that Flash is meant to die, tries to stop her from answering her phone. She answers her phone and informs Barry of a new super-powered supervillain. Bart tries again to dissuade Barry from dealing with it, but fails. Barry changes into his costume and heads to the commotion. Wally looks at Bart and knows full well that he won't stay put.

At a Central City square, the Flash tribute statue is destroyed by the new super villain. He walks through Central City leaving a trail of destruction, releasing circles of energy within seconds of each other. Civilians are running from the danger and a woman and her baby are nearly caught in a blast, but the Flash whisks them to safety and tells them to take shelter at Fox and Gardner.

Neutron's rampage

Neutron causing destruction.

Flash goes into the middle of the danger and gets hit by a circle of energy, and is thrown clear. Impulse causes a wind funnel to catch him before he hits the ground. Flash is impressed and Impulse says that his dad will learn it from him. Flash then questions Impulse on what he's doing. Impulse answers that he wanted to see Flash in his prime and also gives the villain's name—Neutron—and covers his slip by saying that the villain was saying it all the time.

Kid Flash talks to a police captain for an update. Impulse and Flash dart over and Flash tells the captain that the best he can do is keep civilians away from danger. Flash and Impulse discuss strategy: they'll create a funnel to contain the villain. As they talk, their speaking speed increases, and Kid Flash can't keep up. Impulse explains that he should just follow them.

Two aliens watch over Neutron

Two unknown aliens watch over their subject.

Flash, Impulse and Kid Flash make a wind funnel, trapping Neutron inside and causing him to rise into the air. This causes the energy blasts to rise with him where they can make no harm. Two mysterious aliens, who were controlling Neutron from a warehouse elsewhere in the city, monitor their subject. Neutron's suit is destroyed by the explosion caused by the wind funnel. Flash and Impulse have to drag Kid Flash away from the blast.

At a safe distance Kid Flash activates his goggles and scruntizes the energy coming from Neutron and says that he seems to be more unstable then before. Flash asks for the goggles and Wally hands them over. Flash says that Neutron is about to explode again and says that he needs to get him to a desert to save the city. Impulse follows him and trips him before he can get caught in the explosion. Neutron explodes, but Kid Flash and Jay Garrick carried Flash and Impulse to safety. Flash admits that he would not have reached the desert in time.

Impulse goes back to Neutron and drops a pill causing Neutron to return to normal. When the speedsters arrive Bart says that he doesn't know how Neutron went back to normal.

Roy Harper is found

The original Roy Harper is found.

Back in Tibet, Cheshire and Red Arrow have knocked every guard out that was opposing them, causing Lian to laugh. Red Arrow asks Cheshire if he should be worried about their daughter's obvious delight in the ultraviolence. Cheshire replies that it's genetic. They open the door in front of them, and in a cryogenic pod, they find the original Roy. Unconscious, he falls into Red Arrow's arms. Lian recognizes him, and laughs "Dadas!".

Back at Mount Justice Impulse is saying goodbye to everyone and says that it "has been crash". He gets in the time machine, but it doesn't work. Bart knows why and covers it up by saying that the circuits are fried and that he's stuck in the past, seemingly frustrated at the prospect.

Mount Justice
February 28, 10:05 EST

Bart is working on the time machine when the bald man, Nathaniel Tryon, comes to him, asking him if he's finished. He tells Bart that going back in time to save Flash's life was just the beginning and time traveling to 2016 will fry the time machine, making this a one-way trip. Bart sardonically asks if Tryon feels that this was a place worth coming back to and changed into character. Nathaniel gives him a pill that would remove his past powers as Neutron, and Bart heads off to do his mission.

Mount Justice in ruins

After Impulse's past interference: the mountain is still in ruins.

As the time machine disappears, so does the scar on Nathaniel's face, and the inhibitor collar around his neck, as well as his prison clothing, but he is shocked to realize that Impulse's actions in the past seemingly did not change anything else; Impulse's departure point, Mount Justice, is still in ruins.


One definition for the term "Bloodline" is used to describe a family connected by blood. This applies to Bart meeting his grandfather and grandmother from the past. Also, it may refer to Red Arrow finding Roy Harper, whom he was cloned from. Another definition for the term "bloodline" would be the predecessor of a person. In this case, it refers to the long line of speedsters: Jay Garrick, Barry Allen, Wally West and Bart Allen.

Cast and characters

Voice actor Character
Cameron Bowen Robin
Nicole Dubuc Iris West-Allen
George Eads Barry Allen/Flash
Crispin Freeman Red Arrow
Logan Grove Beast Boy
Kelly Hu Cheshire
Lian Nguyen-Harper  
Stephanie Lemelin Computer
Jason Marsden Bart Allen/Impulse  
Jesse McCartney Nightwing
Geoff Pierson Jay Garrick/Flash  
Jason Spisak Kid Flash
James Arnold Taylor Nathaniel Tryon/Neutron  
Black Beetle
Non-speaking roles
Joan Garrick
Mal Duncan
Full credits
Character debut
Speaking debut
Episode debut



"Bloodlines" garnered an average of 1,944 million viewers.[2]


  • Flash mentions a shelter on "Fox and Gardner", a reference to one of Jay Garrick's creators, Gardner Fox.
  • This is the first episode in which Miss Martian is absent since her debut in "Fireworks".
  • Impulse twice says, "Oops, spoilers" when discussing the future. The line is often heard in the TV series Doctor Who, spoken by River Song, a companion from the Doctor's future, when she is concerned about saying too much about the future.
  • The Tibetan Temple where Roy Harper was sequestered in bears a startling resemblance to Paro Taktsang (Tiger's Nest Monastery) located in Bhutan. However, it is likely a coincidence.
  • Carlos Sanches was nominated for an Emmy Award for this episode in the Outstanding Mixing for Television Animation category.[3]
  • This episode is featured on Young Justice: Invasion – Destiny Calling: Season 2 Part 1.


  • When Robin asks Impulse if he's really from the future, his "R" insignia is missing.
  • Right after Red Arrow and Cheshire land on the bell tower, Red Arrow has a gauntlet on the arm facing the screen, but in the next shot, it is a glove.
  • When Impulse is given the pill to cure Neutron before leaving the future, his goggles are on, but in the next shot, they are off and he is seen putting them on.

Cultural references

  • Impulse mentions that "...half the meat at Comic-Con are from his era." Comic-Con International is an annual comic-book and pop culture convention.
  • Red Arrow refers to his and Cheshire's defeat of the League of Shadows assassins as "ultraviolence" after Lian giggles. "Ultra-violence" is a phrase commonly associated with Anthony Burgess's 1962 dystopian novel A Clockwork Orange.


  1. Do not answer here.
  2. Keep the questions open-ended and neutral: do not suggest an answer.
For complete answers to the questions in this section, click here.

Answered questions

Partially answered questions

  • Why wasn't Impulse's apocalyptic future completely subverted after what he accomplished in the present? (Answer #1)

Unanswered questions

  • What is the meaning of the phrase "crash the mode" and how is it known to Impulse, the older Neutron, and the aliens?


  • Robin: You're a tourist from the future?
  • Impulse: Why so surprised? Half the meat at Comic-Con are from my era.

  • Impulse: I know stuff only a future boy would know: (points to Nightwing) Dick Grayson, (points to Robin) Tim Drake, (points to Beast Boy) Garfield Logan.
  • Beast Boy: Your name's Tim? And yours is Dick?

  • Beast Boy: Tell us something we don't know yet. When do I become leader of the Team? When do I join the Justice League? When do I get my own reality series?
  • Impulse: Sorry, BB. Never was the best history student. Besides, we can't risk altering the time stream. We do that and we're all feeling the mode.
  • Beast Boy: And the mode... would be bad?

  • Impulse: Oops. Spoilers.

  • Robin: Doesn't stand a chance does he?
  • Nightwing: Nope. Impulse is too fast.

  • Impulse: (waving at Iris's stomach) Hi, dad! Hi aunt Dawn!
  • Barry: Wait! There are two in there?
  • Iris: We're having twins!?
  • Impulse: Oops! Spoilers.

  • Impulse: (hugs Wally) You're Wally West! My first cousin once removed!
  • Wally: (pulls Impulse off of him) The operative word being removed.

  • Flash: Be back in a flash!
  • Impulse: Does he say that often?
  • Everyone: [sighing] Too often.

  • Flash: Wait, his name's Neutron?
  • Impulse: Yeah, heard him shout it. You know, like bad guys do, "I'm Neutron! All on you will die!" So anyway, what's the plan?

  • Red Arrow: Should I be concerned over the obvious delight our daughter takes in the ultraviolence?
  • Cheshire: It's genetic.
  • Red Arrow: Great.


  1. (2012-06-01). Images, Video, Description From Upcoming Episode Of "Young Justice" Animated Series. World's Finest Online. Retrieved 2012-06-01.
  2. Bryan (2013-02-05). Did #SaveYJandGLTAS Campaign Help "Young Justice" Score Season High Ratings?. Nick and More. Retrieved 2013-02-05.
  3. Sanches, Carlos (2013-05-01). Tweet. Twitter. Retrieved 2013-2013-05-01.

External links