horror - Identify a movie where boy controls his family

Here's the original 1961 episode of Twilight Zone, also on IMDB.

I recall the actor who played the boy went on to star as Will Robinson in Lost In Space. IMDB confirms, actor Bill Mumy. I recall the boy had a line while foisting his evil on some helpless guy "You're a bad man! You're a very bad man!" as the guy dies a slow painful death or something.

I've seen versions of this story in multiple places, including a episode of Supernatural if I recall right.