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: 1967: Burke mangles his line to Vicky, and instead of telling her to get off her history kick, says, "I just think you should get off that hickory stick for a while."
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 Revenge of Robin Hood - S1-E16
Other mistake: During Robin Hood's attack on the castle, the same crossbowman is seen getting shot and falling off the castle wall twice.
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.