From the TV show
- "The Time Merchant", in which John signs away 5 years of his life in a contract with the titular time merchant.
From the movie
- The spiders, who can travel through deep space.
- When Robot is programmed to kill the Robinson Family and John shoots at him. The Robot dodges the shot, then slowly back to face John as if it's glaring before saying its next line in such a cold tone.
- Spider Smith.