Several crew members being to age rapidly after searching for missing colonist while on a resupply mission to Gamma Hydra IV.
| Air Date | 08 December 1967 |
| Production Number | 60340 |
| Stardate | 3478.18 |
| Gregorian Calendar Date | Thursday, 27 December 2266 09:54:04 GMT Thursday, 27 December 2266 13:57:55 GMT |
| Primary Arc | The Romulans |
| Secondary Arc | Bad Medicine |
| Tertiary Arc | n/a |
| See It or Skip It | Skip It… |
| Previously on Star Trek | Order | Next Time on Star Trek |
|---|---|---|
| Mirror, Mirror | Chronological | Friday’s Child |
| Friday’s Child | Air Date | Obsession |
| Mirror, Mirror | Production | I, Mudd |
| The Practical Joker | Primary Arc | The Enterprise Incident |
| The City on the Edge of Forever | Secondary Arc | Friday’s Child |
| n/a | Tertiary Arc | n/a |
Shirtless Sidebar: Kirk’s 34-year-old pecs make an appearance this episode, evidently to remind us of his youthful vitality just before his rapid decline plays out on screen.
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