TV Highlights: Saturday, Sept. 25

SERIES

The Event: NBC encores the pilot of this new sci-fi drama starring Jason Ritter, Blair Underwood and Laura Innes (8 p.m.).

48 Hours Mystery: The true-crime newsmagazine is back for another season (10 p.m. CBS).

Saturday Night Live: Former cast member Amy Poehler returns to host the season premiere, with musical guest Katy Perry (11:29 p.m. NBC).

SPECIALS

What the Pope Knew: The sexual abuse scandal in the Roman Catholic Church is examined (5, 8 and 11 p.m. CNN).

Battle for the Future: Politics, the economy and 2010 midterm elections are discussed in this new special hosted by John Stossel (6 p.m. Fox News Channel).

MOVIES

Up in the Air: Corporate downsizer George Clooney gets cut down to size in this poignant 2009 comedy-drama; Vera Farmiga and Anna Kendrick also star (8 p.m. HBO).

Maternal Obsession: Jean Louisa Kelly and Kirsten Prout star in this made-for-TV melodrama (9 p.m. Lifetime).

Armored: Matt Dillon and Jean Reno head the cast of this 2009 heist caper (9 p.m. Starz).

Sharktopus: It’s exactly what it sounds like in this made-for-cable 2010 creature feature from legendary B-movie producer Roger Corman (9 p.m. Syfy).

Ninja Assassin: South Korean pop music phenom Rain stars in this 2009 martial arts tale (10 p.m. Cinemax).

SPORTS

Baseball: The Cardinals challenge the Cubs (10 a.m. WGN America), the Reds play the Padres (1 p.m. Fox), the Dodgers visit the Diamondbacks (5 p.m. FS Prime) and the Angels host the White Sox (6 p.m. MyNet).

College football: The Trojans take on Washington State (noon FS Prime), and the Bruins battle Texas (12:30 p.m. ABC).

Soccer: Chivas USA faces the Philadelphia Union (2 p.m. FSN).