If you could travel through time to kill Adolph Hitler as a baby, knowing it would spare countless lives, would you? "DC's Legends of Tomorrow" face a similar quandary next week, when they travel to their future and Rip Hunter's past to defeat Vandal Savage. To do so, however, a 14-year-old boy, destined to become a bloodthirsty ruler, must die.

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The next episode of "DC's Legends of Tomorrow," "Progeny," airs Thursday, April 7 at 8 p.m. on The CW.

RIP CROSSES THE LINE IN HIS EFFORT TO SAVE HIS FAMILY - Rip (Arthur Darvill) tells the team they are headed to the future to take out a powerful ally that Savage (guest star Casper Crump) needs in order to conquer the world.  However, when Rip reveals the ally is a 14 year-old boy (guest star Cory Gruter-Andrew) who will one day grow into an evil dictator, the team is split about the morality of killing a child, even if it does save the world.  Meanwhile, Sara (Caity Lotz) talks Snart (Wentworth Miller) through a rough patch and Ray (Brandon Routh) learns something that could impact his future with Kendra (Ciara Renee).  David Geddes directed the episode written by Phil Klemmer and Marc Guggenheim (#110). Original airdate 4/7/2016.