Is There in Truth No Beauty? - S3-E5
Other mistake: In the final scene, Kirk is still in the transporter room, but does not have on a visor when the ambassador transports out. Even if he did, humans can still go mad if wearing one and that's why Spock operates the transporter. Spock has his visor on, but then you see Kirk walk out of the transporter room without a visor and he is not going mad.
Other mistake: The episode's action takes place around 11:00pm (night time), yet all the scenes show broad daylight.
Other mistake: 1970: Barnabas fends off a werewolf by striking at it with his silver-headed cane. Unfortunately, the cane bounces off the resilient werewolf and hits Barnabas in the head. (Jonathan Frid reportedly had to have a few stitches afterwards.)
Other mistake: During the scenes of the invasion of Normandy, stock footage of U.S. Marines, Marine landing craft, Marine tanks, etc., conducting landings in the Pacific theater is used.
Surf's Up! Joker's Under! - S3-E10
Other mistake: An amazingly precognizant Dick Grayson is already wearing his surfing togs before Commissioner Gordon calls to say that Joker has invaded the surfing community. (00:04:30)
Suggested correction: Dick isn't amazingly precognizant. He's wearing swim trunks while using the rag to prep his own surfboard. Barbara Gordon was already at the beach with Skip, and Dick is heading to the beach with his surfboard as well (00:04:34).
Other mistake: Jane Webb is listed in the closing credits as "Store Lady". She actually played the "Story Lady". (00:25:00)
The Case of the Missing Monkee - S1-E17
Other mistake: When Peter is tied up at the Remington Clinic, as the camera does a pan from behind him, you can see that he has been tied with a quick-release knot.