While investigating temporal anomalies emanating from a barren planet, Doctor McCoy accidentally overdoses on a miracle drug that makes him go crazy, beam off the ship, run through an ancient time portal, and alter Earth’s history. Spock and Kirk chase after him to set things right.
| Air Date | 06 April 1967 |
| Production Number | 6149-28 |
| Stardate | Unknown (approximately 3270.5) & February 1930 |
| Gregorian Calendar Date | Wednesday, 14 November 2266 11:19:29 GMT Wednesday, 14 November 2266 12:18:59 GMT |
| Primary Arc | Temporal Investigations |
| Secondary Arc | Bad Medicine |
| Tertiary Arc | Kirk’s Adventures |
| See It or Skip It | See It! |
| Previously on Star Trek | Order | Next Time on Star Trek |
|---|---|---|
| Metamorphosis | Chronological | Operation — Annihilate! |
| The Alternative Factor | Air Date | Operation — Annihilate! |
| Errand of Mercy | Production | Operation — Annihilate! |
| Tomorrow is Yesterday | Primary Arc | Return to Tomorrow |
| The Dagger of the Mind | Secondary Arc | Operation — Annihilate! |
| The Conscience of the King | Tertiary Arc | Operation — Annihilate! |
Stardate Sidebar: Based on episode placement in the first season, and considering the chronologically earlier second season episode “Metamorphosis,” the events of this episode take place sometime after 05:00 hours GMT on Monday, 5 November 2266 (the latest stardate given in “Metamorphosis”) and sometime before 11:30 hours GMT on 18 November 2266 (the earliest stardate given in “Operation — Annihilate!”) Based on dialogue in the episode, the Enterprise had been monitoring the temporal disturbance for “the past week,” so roughly seven days needs to have lapsed since the end of the prior episode. Therefore, we can estimate the stardate to be approximately 3270.5. As to where Kirk and Spock end up in the past, and assuming Spock is always rather precise in quoting data to his captain, we know the events occur six years prior to 23 February 1936. So, the bulk of the episode must occur over several weeks in February 1930.
Watch Trek 