Dinky claims he got the plans for his moon rocket from Popular Mechanics magazine. He can't show it to Oliver because it crashed into Simpson's Swamp upon re-entry.
For just $87, Haney offers the Douglases dirt dug up from the Sea of Tranquil-lil-ity on the moon and two gen-u-wine Mars rocks hurled at him by a flying saucer.
Oliver: Can I ask you something? What would make a rock beep?
Wilson: (dismissing Oliver as a kook) I'd say about three martinis.
Oliver: Where did you get the idea I was such a big drinker?
Lisa: Watching you belt down the martoonies.
Oliver: (when Arnold walks in) Well, it's all I need. It's the Tiny Tim of the hog set!
Johnny Whitaker appeared just a few episodes earlier (#138 The Confrontation) playing a different child, Willie.