The Big Bang Theory Amy (Mayim Bialik) lies about the status of her apartment’s repairs so she can keep living with Sheldon (Jim Parsons), but the truth may come out as they stage an installment of “Fun With Flags” from Penny’s (Kaley Cuoco) apartment. Johnny Galecki also stars. 8 p.m. CBS
Superstore The store is used as a polling site, and the store’s owners distribute a voters guide that supports their interests, prompting Amy and Jonah (America Ferrera, Ben Feldman) to devise an opposing guide. 8 p.m. NBC
DC's Legends of Tomorrow The Legends are sent back to the mid-19th century,...