In June 2010, Breck's wife Diane announced on his website that the actor had been suffering from dementia and could no longer sign autographs for fans, although she said that he still read and enjoyed their letters. Despite this diagnosis, she said he was still physically healthy and did not require medication. Thereafter, Diane Breck reported that her husband was hospitalized on January 10, 2012. On February 6, 2012, Peter Breck died from his illness at the age of eighty-two.
- The Crawling Hand (Experiment #106) - as Steve Curan
- The Beatniks (Experiment #415) - as Mooney
- The Sword and the Sorcereor (RiffTrax) - as King Leonidas