Critic's corner

9 p.m., Channel 5
Mer-Der most foul? Or fair? Meredith and Derek are back together as the show returns. But I'm more interested in the arrival of Kevin McKidd (above right) as the new doc in town who may have a thang with Dr. Yang. McKidd, whose "Journeyman" didn't survive on NBC, was unforgettable in the HBO series "Rome," as centurion Lucius Vorenus.

10 p.m., Channel 7
The season starts with the aftermath of an explosion. Some things never change.

8 p.m., Channel 4
So let's get some camera equipment there fast.

10 p.m., Discovery Channel
Bridges, not bonds.

8 and 8:30 p.m., Channel 7
Back to the list. In the season premiere, Earl has to help a guy make a movie about a giant squid in which Randy plays the president. The guy is a make-a-wish kid who grew up, and he is played by Seth Green, so insanity ensues. I often forget about "Earl," but I miss Randy and plan to make a return visit.

8 p.m., Channel 5
Pop Iggy gets a new job.

10:30 p.m., Comedy Central
She licks her dog's rear. And that's why I love this show.

1/2 Comcast, Free Movies
Meet the new Freddy, a killer doll called Chucky, brought to you by the director of "Fright Night." (R; runs through Oct. 2)