"I'm sure First Officer Spock has recovered that information from our tapes already," she replied icily.

Suddenly, the signal is gone and First Officer Spock, himself half-Vulcan, shudders and feels uneasy.

I repeat, this is First Officer Spock.

This is First Officer Spock calling Enterprise.

This is First Officer Spock of the starship Enterprise.

In this episode, telepathic aliens take control of Captain Kirk's and First Officer Spock's bodies.

Security, this is First Officer Spock.

Kirk leads a landing party, which includes First Officer Spock, a yeoman and a security detail, down to meet with Eminiar leaders.

So when the door slid aside to admit First Officer Spock, Darnell was a little surprised.

Even First Officer Spock had remarked on their appearance, and he seldom remarked on anything that didn't pertain to the ship's operation.