Watch it

“Sharktopus” (9 p.m., Syfy). A military experiment goes horribly awry when a shark/octopus hybrid goes on a beach killing spree. This will be the most awesomely schlocktastic made-for-TV movie ever broadcast. Syfy: Imagine greater.

“Saturday Night Live” (11:30 p.m., NBC). Season premiere. SNL alum Amy Poehler hosts with musical guest Katy Perry, fresh off her “Sesame Street” “C is for Cleavage” controversy.

Catch up

Now’s your chance to catch one of the series premieres you may have missed earlier in the week. NBC has “The Event” (8 p.m.) and “Chase” (9 p.m.), CBS has “Hawaii Five-O” (8 p.m.) and “Blue Bloods” (9 p.m.), and Fox has “Lone Star” (11 p.m.). Of those, “Hawaii Five-O” is probably the best bet for a mindless Saturday night. “Lone Star” got good reviews, but so few viewers that it might be the first fall show canceled unless a whole lot more people start watching really soon.

Catch a score

Stanford vs. Notre Dame (12:30 p.m., NBC). Watch Andrew Luck shred the Irish.

Alabama vs. Arkansas (12:30 p.m., CBS). A huge matchup of two of the top teams in the SEC.

Oregon State vs. Boise State (5 p.m., ABC). Should be a fun matchup, with the Beavers’ high-octane running game against Boise’s tough defense. And one more chance against a major school for the Broncos to prove they’re a national title contender.

Cal vs. Arizona (7 p.m., CSN+). This one could get ugly for the Bears.

Giants vs. Rockies (5 p.m., CSN-BA). An absolutely huge series in Colorado between NL West contenders.

Skip it

“I (Almost) Got Away With It” (8, 9 and 10 p.m., Discovery). A new docu-series about murderers and how they, well, almost got away with it. Sounds super trashy and kinda appalling.