Blazing Saddles (6 p.m., TV Land) and Young Frankenstein (8 p.m., TV Land): Back-to-back comedy classics from Mel Brooks. And both were released in 1974, believe it or not. (R)

Doctor Who (7 and 9 p.m., Sci Fi): The Doctor tries to solve a murder mystery — it seems that Professor Peach was killed in the library with a lead pipe.

Battlestar Galactica (8 and 10 p.m., Sci Fi): It's the midseason finale of the show's final season, so expect a cliffhanger. The rebel Cylons are holding President Roslin hostage while they try to lure the Final Five out of hiding on the Galactica.

Just don't hold your breath waiting for the next episode, because you won't be able to last until January, when the second half of the final season begins.

iCarly (9 p.m., Nick): In an episode that's both rather amusing and right on the mark, network executives want to put the Web cast iCarly on TV, but they insist on a lot of dumb, pointless changes, which ruin the show.