In "Johnny, Real Good", Timmy's mother is voiced by June Lockhart. This is an in-joke as she played Maureen Robinson, the mother of Bill Mumy's character Will Robinson, in Lost in Space (1965). Mumy also played Anthony Fremont, the child with immense mental powers, in It's a Good Life (1961), of which "Johnny, Real Good" is a parody. Other references to Mumy include Johnny calling Timmy "Billy" and "Will Robinson."