Factual error: Part 4: The cord on the telephone Pug uses to call Pam should be a straight wire. Instead, it's coiled: a design not yet in use in the 1940s. (00:13:30)
A Nice Place to Visit - S1-E14
Factual error: When the team is in uniform for their friend's funeral, Smith and Peck (both commissioned officers) have their Special Forces insignias on their berets when they should have their rank insignia.
Factual error: The whole "Did the referee blow his whistle because of the goal, or because the match is over" isn't possible; the referee blows his whistle three times for the end of the match, not just a single time. (However, it should be noted that technically it's a universally adopted convention but not a hard-coded rule). (00:05:50)