Fox has canceled Ryan Seacrest's new "Knock Knock Live" summer reality series due to low ratings.
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Variety reported the show -- which features celebrities such as Justin Bieber arriving on regular people's doorsteps to present them with prizes -- was taken off the air after two episodes.
Replacing the program in the Tuesday 9 p.m. timeslot will be an hour of "The Last Man on Earth" this week, then repeats of "Brooklyn Nine-Nine" and "The Last Man on Earth" after that.
Seacrest will return to the network in January to host the final season of "American Idol."