Captain Kirk is no longer alive (Star Trek: The Tholian Web)

[Assembly room]
(Spock stands on a raised platform, behind a lectern. Crew and officers are filing in.) SPOCK: Doctor, your last report on an antidote on the effects of this space was negative. MCCOY: It's still negative, Mister Spock. Theragen is the most promising substance tested so far. We're progressing. SPOCK: The urgency requires your personal attention in the laboratory. MCCOY: My staff is working around the clock. My being there will not affect the biochemistry of any of the tests. This service requires my personal attention, Mister Spock. (He sits next to Scott.) SPOCK: A few hours ago, the Captain elected to remain on board the Defiant so that three members of this crew would have the best chance of returning safely to the Enterprise. His concern was not only for them, but for all the members of the crew of this ship. You all know the sequence of events. We were fired upon by the Tholian ship. At that time, Captain Kirk may have been alive. I deemed it necessary to return the Tholian fire for the safety of the Enterprise. The Tholian ship has been disabled. But as a result of the battle, we must accept the fact that Captain Kirk is no longer alive. (A crewman goes berserk and is carried out by three security men.) MCCOY: Take him to Sickbay. Put him in restraint.