The Big Bang Theory Leonard's (Johnny Galecki) mother (Christine Baranski) visits and Penny (Kaley Cuoco) tries to get to know her better. 8 p.m. CBS
DC's Legends of Tomorrow Vandal Savage (Casper Crump) is apprehended by the Legends, but he still has some cards to play in trying to arrange an escape. In exchange for letting him survive, he promises Kendra (Ciara Renee) a reunion with Carter (Falk Hentschel). 8 p.m. KTLA
Grey's Anatomy Callie and Arizona (Sara Ramirez, Jessica Capshaw) continue to have discord over plans for Sofia. 8 p.m....