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Martin Mull (born August 18, 1943) was an American actor, comedian, painter and recording artist. He portrays Walter Peralta on Brooklyn Nine-Nine. He is known for his roles as Garth Gimble in Mary Hartman, Mary Hartman and its spinoff Fernwood 2 Night, Colonel Mustard in Clue and Leon Carp in Roseanne.

Appearances[]

Season Seven[]

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