Mental Block is a Canadian comedy TV series, which premiered September 1, 2003 on YTV and TQS. It is created and written by Leila Basen and David Preston and directed by Sean Dwyer and Michael Kennedy.

The show revolves around thirteen-year-old Donovan Mackay. His mom and dad seem to be going through a second adolescence, while he's going through his first. His best friends, Ira and Shelley don't even register on the "cool meter" at school. His main crush, Chloe, is so far out of his league she doesn't know he's on the team. Luckily, Donovan has four teenagers living inside his head, Sparks, Maynard, Skipper, and RJ. Their mission is to get Donovan through another adventurous and unpredictable day as a teenager in suburban Greenfield Park Junior High. The show is produced by Zone 3 and filmed in Montreal, Quebec, Canada. It is distributed by Alliance Atlantis.

In the second season, Donovan himself is seen inside his head, and the other kids help advise him instead of directly controlling him. Also Maynard is gone.