“the big bang theory” (8 p.m., cbs): Could Leonard and Penny (Johnny Galecki, Kaley

“the big bang theory” (8 p.m., cbs): Could Leonard and Penny (Johnny Galecki, Kaley Cuoco) be rekindling their romance on “The Big Bang Theory”? It looks that way when he invites her to a dinner for two on the show’s milestone 100th episode.

“archer” (10 p.m., fx): The animated spy series “Archer” figures to get weirder and funnier this season as Burt Reynolds — playing himself — comes aboard as a love interest for Malory (voiced by Jessica Walter). Immediately following is the debut of “Unsupervised,” a new cartoon about two socially awkward high-school pals.

tv listings, B6