The upcoming Young Justice episode “Coldhearted” looks to be
adapted from or inspired by Wally West’s first solo Flash issue. It features Wally West’s birthday, a cross-country run to deliver a heart for a transplant, and Vandal Savage.
Wally West comes oh-so-close to fulfilling his birthday wish to finally fight alongside the Justice League. Instead, a massively disappointed Kid Flash is taken off the mission and tasked with a simple delivery job. But a few deadly surprises await the birthday boy along the way….
Comic Book Resources has two clips and some stills from the episode. (Thanks to @CraigRMacDonald for the tip!)