"Well, Worf? Care to explain that photograph?"
"That is not me."
"Then...that is not Counselor Troi."
"What a glorious sunset!"
"Uh, 'nebula,' sir."
"There, there, Marina. It's just a simple character swap. I know you were looking forward to playing the security chief, but I'm sure ship's counselor will turn out to be a totally kick-ass role!"