Holy Smokes! OK, it's clear that someone involved with Cheers was a fan of Lionel. I already posted about a season 7 episode where Lionel trains were discussed, but check out this even better clip from Episode 6 of Season 8! Note the ZW, among other stuff!
What's cool to think about is that I'm sure they had some train guys come onto the set to get that thing set up and running right.
Thanks,
Eric Siegel