Peter MacDougall (10 episodes; played by Chris Elliott) is Amy 's older brother. He has a strange, psychologically unstable personality (Robert once stated that "There are squirrels juggling knives in his head '') and a duplicitous, quick - witted mind. Opposed to his sister 's marriage, he insists that he will keep trying to break it up, which explains the reason why during Robert 's wedding that Robert and Ray looked at him when the pastor asked if anyone objected to Robert and Amy 's marriage. Peter is single but lives with his pet house cat, Miss Puss. At first, Peter and Robert hate each other, but in "Peter on the Couch, '' the two find common ground in the fact that they both suffered from being the overshadowed older sibling and living with their parents. He is fond of Ray, although the feeling is n't mutual. Peter was originally introduced as "Russell '', the owner of a comic book shop (played by comedian Paul Reubens) in a one - time appearance. Russell abruptly became Peter because in "Just a Formality '' (episode 7.14), Peter mentions meeting Ray at the comic book store (which was Russell).
who played amy's brother peter on everybody loves raymond
Chris Elliott