Will is wearing a Band-Aid on his chin claiming he cut himself practicing how to shave.
Those aren't the hands of guest star Henry Jones doing the sleight of hand with the Robinson ladies but of noted Hollywood magician Jay Ose.
Allan Melvin's voice is heard as Little Joe and also as the voice of the gambling machine. Fans might recognize him more as one of Archie Bunker's friends Barney Hefner on All in the Family and Archie Bunker's Place and years earlier as Sam Franklin the butcher, Alice's boyfriend, on The Brady Bunch.
Allan Melvin returns in his second and final Lost in Space appearance in the very next episode "West of Mars" as Enforcer Claudio.