We're All Dying (The Immunity Syndrome)

KIRK: This is the Captain. We're on a difficult mission, but it's not the first time. Our orders do not say stay alive or retreat.

[Engineering]

KIRK [OC]: Our mission is to investigate.

[Sickbay]

KIRK [OC]: We're sick, and we're getting sicker.

[Bridge]

KIRK: We have no guarantees, but we have a good ship and the best crew in Starfleet. So do your jobs. Carry on. Kirk out.

[McCoy's office]

MCCOY: Sickbay to Captain Kirk.

KIRK [OC]: Kirk here. Go ahead, Bones.

MCCOY: Jim, according to the life indicators, the energy levels

[Bridge]

KIRK: Yes, say it, Bones.

[McCoy's office]

MCCOY: According to the life monitors, we're dying.

[Bridge]

MCCOY [OC]: We're all dying.