The first scene in "Wink of an Eye" has Scotty recording a ship's log entry. But what we see doesn't match the other shots in the episode:
That communications officer obviously isn't Uhura, and Scotty's hair is the early-third-season style that James Doohan reportedly hated (it was gone after a few episodes.)
A few seconds later Kirk is speaking with Uhura (whom we see) and a few minutes later Scotty's hair is different.
Maybe the Scalosians were trying to distort our senses, too.

That communications officer obviously isn't Uhura, and Scotty's hair is the early-third-season style that James Doohan reportedly hated (it was gone after a few episodes.)
A few seconds later Kirk is speaking with Uhura (whom we see) and a few minutes later Scotty's hair is different.
Maybe the Scalosians were trying to distort our senses, too.