THE BIG BONG THEORY
CBS, 8:00 p.m. ET
SERIES PREMIERE: All the networks are going crazy for reboots and revivals at the moment, and CBS, which already has tasted success this year with its Big Bang Theory spinoff Young Sheldon, tonight launches another prequel spinoff – this one, appropriately, not just an extended flashback, but a time-traveling continuation of the Big Bang story line. Sheldon and Leonard, playing around one day after watching a marathon of time-travel movies, attempt to build a time machine with spare parts available in their apartments. They fall asleep before they can test it, but comic book store owner Stuart (Kevin Sussman) pops by, turns it on, and whisks himself back to the drug-fueled basement of That ’70s Show – where Stuart finds himself surrounded by a group of less sarcastic friends. He also spends most of his time, at least in the pilot episode made available for preview, purchasing all the 1970s comics he can get his hands on, to make him rich upon his return trip.