As a youngster, The Uninvited (Luis Avalos) is the only child in his class to not be invited to a birthday party. He gets his revenge by inviting himself to parties to rob the guests. One of The Uninvited's victims is J. Arthur Crank (Jim Boyd, cameoing his signature role on The Electric Company), when the Uninvited invites himself to Crank's bath night, stealing his last dry towel and his rubber duckie: the one his friend Ernie gave him! Just as the Uninvited invites himself to steal a construction worker's (Judy Graubart) salary, Spidey extends a special invitation to The Uninvited: to jail, courtesy of a webbing.
