@MarkVB posted:Ellery Queen The Eccentric Engineer. This just popped up on my YouTube feed. Ed McMahon is a supposedly crackpot inventor who is secretly developing a potentially lucrative automation system using a large Lionel layout and is murdered for his secrets. Lots of train action. Several well known actors in the cast.
That was a fascinating episode, I wonder where the layout was from as it was very well done and looked more permanent than something setup for a single TV episode.