The networks are unveiling more mid-season TV plans. Some highlights:

The CW
— “Reaper” returns March 17 (Wednesday at 9 p.m.), paired with “90210.”

— “Medium” returns Feb. 2 (Monday at 10 p.m.), following “Chuck” and “Heroes.”
— “ER” ends March 12.
— “Kings,” a modern variation of the David-and-Goliath story, takes “ER’s” place on March 19 (Thursday at 10).
— An hour-long “Office” will air after the Super Bowl on Feb. 1.

— “Flashpoint” returns Jan. 9 (Friday at 9 p.m.), between “Ghost Whisperer” and “Numbers.”
— “Harper’s Island,” a 13-episode serialized mystery set on a secluded island off the coast of Seattle, debuts April 9 (Thursday at 10 p.m.)