The timeslot where "24" is televised. Literally, an hour (minus commercials) of Jack Bauer (bad-ass counter-terrorist agent played by Keifer Sutherland) using his power (knocking off the bad guys in bad-ass ways).
Dude, want to head downtown, have a few beers and grab some tail?
What are you, nuts? Jack Bauer Power Hour's on! I don't even answer the phone!