Howard Zimmerman

Todd Davis (a.k.a. Arthur Hart) (uncredited) / Todd Davis (a.k.a. Arthur Hart)

Monk Receptionist (voice) / Monk Receptionist / Additional Voices (voice)

Dr. Grey

The Dean (uncredited)

Don Cabeza (voice) (uncredited)

Self - Arthur Hart

Mel (uncredited)

Mr Irving

Observatory (voice)

Clarence

Mayor (voice)

Undesirables Onlooker

Marty

Head Nuclear Scientist

Howard

Communist Writer