<P> Hank is a former professor and is now a high school principal . He is known to be opposed to smoking, and his line when he sees someone smoking is "Why don't you just drink poison?". Pat is a housewife, and has a high - pitched, gentle voice . She is shown to be a protective and loving mother . </P> <Ul> <Li> 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 isn'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). </Li> <Li> Lois and Warren Whelan (14 and 11 episodes, played by Katherine Helmond and Robert Culp) are Debra's parents . Even though they are an authoritarian conservative family, they are shown to have a breakdown and actually hate their marriage and hobbies . They are from Connecticut . They are also upper class, and have different beliefs from the middle class Barones . However, the Whelans have a huge amount of respect towards them for their bluntness and start to imitate them, angering Debra . </Li> </Ul> <Li> 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 isn'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). </Li> <Li> Lois and Warren Whelan (14 and 11 episodes, played by Katherine Helmond and Robert Culp) are Debra's parents . Even though they are an authoritarian conservative family, they are shown to have a breakdown and actually hate their marriage and hobbies . They are from Connecticut . They are also upper class, and have different beliefs from the middle class Barones . However, the Whelans have a huge amount of respect towards them for their bluntness and start to imitate them, angering Debra . </Li>

Who played amy's brother peter on everybody loves raymond