Darsteller und CrewLeslie NielsenNarratorGroucho MarxHimself (archive footage)Harpo MarxHimself (archive footage)Chico MarxHimself (archive footage)Irving BrecherHimselfDavid LeafSchreiber:in, Regisseur:inJohn ScheinfeldRegisseur:inBill MarxHimselfGeorge FennemanHimselfJohn GuedelHimself