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 - full stop. On top of that, they can travel through deep space.
- When Robot was 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 it's next line in such a cold tone. That was pretty intimidating to this troper.
- Spider Smith, full stop.