Tonight on DC’s Legends of Tomorrow (The CW, 8/7c), Professor Stein breaks one of Rip Hunter’s rules by bumping into his younger self. But leave it to saucy Sara to make the best of a potentially time continuum-exploding situation.

In Part 2 of the series premiere, the Legends’ first scuffle with Vandal Savage has unexpected, timeline-altering consequences, leading Stein, Sara and Jax (played by Victor Garber, Caity Lotz and Franz Drameh) to the circa-1975 college campus where “Marty” had lusher locks (and apparently doobies ready to spark).

Speaking of sparking: As seen in the exclusive sneak peek above, Sara gets her flirt on when Young Martin (UnREAL‘s Graeme McComb) starts asking too many questions about his new groupies. How does the older Stein react to the unfurling of events?

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