CBS | 8:00 pm

Tonight's episode, "Abduction + Memory + Time + Fireworks + Dispersal," marks the series finale of this CBS reboot of a classic 1980s action series. Worse news for fans: The hour already had been shot before CBS lowered the ax, so don't expect much in the way of closure. This CBS do-over has seen a 22 percent decline in ratings from viewership last season, as well as some behind-the scenes production turmoil. Title star Lucas Till is backed up by Tristin Mays, Justin Hires, Meredith Eaton, Levy Tran and Henry Ian Cusick.