DRAMA. This monster-hunting drama moves ahead one year after Dean (Jensen Ackles) was sent to purgatory at the end of last season. He's out now — with a new vampire pal (Ty Olsson) who helped him escape. Exactly how he arrived back on earth and what his brother Sam (Jared Padalecki) was up to during that time will play out in Season 8 through flashbacks.
Season premiere, 9 p.m., The CW
"Key & Peele"
COMEDY. Watch the presidential debate (9 p.m., ABC, CBS, Fox, NBC), then watch Luther, Obama's Angry Translator, say everything the incumbent <ital>really<ital> meant.
10:30 p.m., Comedy Central
COMEDY. The Bird-Kersees go shopping at the mall. Aliens — they're just like us!
8:30 p.m., ABC