The Cuckoo Clock of Doom is a television episode adapted from the novella of the same name written by R. L. Stine. It was written by Billy Brown and Dan Angel and directed by John Bell. It first aired November 3, 1995.
Michael Webster vandalizes his father's new cuckoo clock by twisting the bird's head backwards so his annoying, bratty, trouble-making younger sister Tara will get blamed for it. However, the plan goes wrong when Michael finds himself reliving his disastrous birthday party – and going backwards in time. The only way to stop it is to fix the bird's head. Though Michael succeeds as a toddler and returns to his normal self, he inadvertently knocks off the year 1988 which was part of the clock and removes/erases Tara from existence. Michael decides to replace the year back on the clock to restore Tara, but not for a while.