Here's the official plot summary for "Legends of Tomorrow" third episode, "Blood Ties":
SNART VISITS HIS PAST; STEIN AND RAY TEAM UP — Rip (Arthur Darvill) decides to weaken Vandal Savage (Casper Crump) by going after his financial assets. Rip and Sara (Caity Lotz) infiltrate Savage’s bank, but are discovered by his men. Meanwhile, Snart (Wentworth Miller) and Rory (Dominic Purcell) talk Jax (Franz Drameh) into taking the jump ship back to Central City so they can steal a valuable emerald. Professor Stein (Victor Garber) guides Ray (Brandon Routh) on a dangerous mission. Dermott Downs directed the episode written by Marc Guggenheim & Chris Fedak (#103). Original airdate 2/4/2016.