During the Final Jeopardy segment, Cliff's answer appears and disappears from his podium screen before it is supposed to be revealed.
Cliff Clavin's Final Jeopardy response appears, disappears and then reappears again throughout the round. It's most noticeable as Alex Trebek is explaining to Clavin that he'd surely win the game as long as he didn't do anything foolish.
During the Final Jeopardy segment, Agnes, the female contestant, starts with $3300, answers incorrectly, bets $2900 and thus is left with $400. When they later pan to a close-up of Agnes' podium, the amount shown is back to $3300.
Cliff, as well as Alex Trebek, would be unable to openly or publicly talk about his Jeopardy! results until after his game aired, which would be several weeks or even months after it was filmed.
The Final Jeopardy answer of "Archibald Leach, Bernard Schwartz and Lucille LeSueur" should not have been under the category "MOVIES" but more under a category like "HOLLYWOOD ACTORS", and might have a more elaborate answer like, "These three actors' birth names are Archibald Leach, Bernard Schwartz and Lucille LeSueur".
When Timmy, posing as Sam, calls Rebecca for the "date" she is seen answering the call at Cheers. The number Sam would have for Rebecca in his stolen Black Book, would be her personal or home number, not her work number, which Sam would know already.
Before he sends Timmy on his way, Sam tells him that he's going to give him $25 so that he can get a decent haircut. But Sam pulls only one bill out of his wallet.