Revealing mistake: When they switch over to a rock format at the station, Dr. Johnny Fever puts on the first record and sets up the needle. The needle then proceeds to ride across the entire record when it starts to spin all the way to the center of the record.
Turkeys Away - S1-E7
Continuity mistake: While Les is on-air after the first few turkeys have been dropped, in the wide shot of Johnny, Bailey, Venus, and Andy inside the studio, the record on the turntable has a brown label as Les mentions the Hindenburg tragedy and cuts out. In Johnny's closeup he closes with his "bombed with live turkeys" mall update. Then back to a wide shot, and the record on the turntable now has a white label, even though it has not been touched. (00:24:15)
Continuity mistake: In the control room during the interview, one shot shows Johnny Fever without glasses, next shot in same scene, he has his glasses on.
Answer: "Tornado", s01e12.
Bishop73