In season 1, episode 4, one of Railroad President Norman P. Curtis friends Frank is asking for a new throttle lever for the "Hooterville Cannonball". He asked his staff to take one from the "Emma Sweeny". The "Emma Sweeny" was the star of the 1950 movie A Ticket to Tomahawk and is actually steam locomotive Nr. 20 from the Rio Grande Southern.
Ivory soap sponsored this episode, and an Ivory soap picture is superimposed on the screen twice during closing credits.