In an eighth season Cheers episode , Frasier claims that his father is dead and was a scientist in life .
Although Martin is first mentioned in an episode of the sitcom Cheers , his life history is mainly expanded on in Frasier .
In an eighth season Cheers episode , Frasier claims that Frasier 's father is dead and was a scientist in life .
Although Martin is first mentioned in an episode of the sitcom Cheers , his life history is mainly expanded on in Frasier .