According to executive producer Richard Gordon, the theater in which The Great Vorelli performs was not open to the public at the time and was scheduled to be demolished. The film crew was able to shoot inside the theater for the show and backstage scenes before the deadline for the building's demolition.
Like the ventriloquist dummy in the similar segment of Dead of Night, the doll's name is Hugo.
The dwarf who portrays Hugo the Dummy was performed by a woman even though Hugo is a male dummy.