Big continuity error in "Assignment: Earth"
By "big" I mean really noticeable.
In "Assignment: Earth", Gary Seven is wearing a dark-colored suit when he is questioned (about his identity) by the Beta 5 computer. (He's annoyed by the machine's "snobbery".)
The episode then briefly cuts back to the Enterprise for a quick dialog exchange between Kirk and Spock, then immediately goes back to Seven's office, where he's still talking to the Beta 5 computer...
Only now he's wearing a completely different, light-colored suit.
Send her to the snakes!