Imagine you could swap out the main character of any particular Trek episode with another main character from the same series - that is, put a fellow crewmember in the same position.
For instance, Chekov instead of Scotty in "Wolf in the Fold". With the youth and newness of the character (compared to Scotty), we might more easily believe he'd be impulsive than Scott, who managed to keep his cool until the Klingons insulted the Enterprise in "The Trouble With Tribbles".
With few exceptions (job-related, though some tweaks could fix that - an episode that centered on Crusher in her capacity as a doctor could be switched to La Forge with a similar engineering dilemma, for instance), most episodes could have some interesting swaps.
What other episodes would be different with someone else in the starring role and how?
For instance, Chekov instead of Scotty in "Wolf in the Fold". With the youth and newness of the character (compared to Scotty), we might more easily believe he'd be impulsive than Scott, who managed to keep his cool until the Klingons insulted the Enterprise in "The Trouble With Tribbles".
With few exceptions (job-related, though some tweaks could fix that - an episode that centered on Crusher in her capacity as a doctor could be switched to La Forge with a similar engineering dilemma, for instance), most episodes could have some interesting swaps.
What other episodes would be different with someone else in the starring role and how?