The Wild Cards (S09E05)

A formidable new supervillain known as The Ace has emerged, rallying a group of four ruthless criminals to form the Royal Flush Gang, all clad in eerie playing-card-themed outfits. As Robin and Cyborg work to thwart this nefarious crew, they uncover that The Ace is receiving commands straight from their longstanding foe, Darkseid. Meanwhile, Batman is taken aback to realize that The Ace isn't a fresh adversary; in fact, it’s an old foe he thought he’d left behind—the Joker!