The two jewel thieves enter the station and accost Schemer, claiming to be undercover cops. Stacy enters the scene, and when the crooks won't show any ID, she wards them off with a baseball bat.
In one of the last scenes, Stacy and Mr. King take a switcher out of the yard to head off the thieves, who stole Ginny's truck and were chasing Schemer down the road.
Schemer gets one in the episode where he's trying to join a club run by the bigoted Mr Hume. Stacy, Billy and the kids can tell Mr Hume is a jerk who looks down on people, but Schemer is too determined to join to notice. Towards the end, though, he tries to set it up so his friends can join as well, but Mr Hume begins to list all the superficial "flaws" they have, and Schemer slowly realizes what a kind of club he's really joining. And then, when he is told he'll have to cut off his curl to be "one of them", he finally gets angry with Mr Hume, tricks him into eating some very sticky toffee, and promptly tells him if his club "isn't good enough for my friends, then it isn't good enough for me!"
WTH, Casting Agency?: Ringo Starr (the first Mr. Conductor) was an odd choice for the role, although the reasoning was sound — he had already provided the narration for the Thomas shorts (that were made up to that point). But then they brought in George Carlin (yes, the same guy known for the Seven Dirty Words bit) to replace him...