| Season | Episode | Episode Name | Air Date |
|---|---|---|---|
| 1 | 1 | Beyond the Farthest Star | 09/08/1973 |
| 1 | 2 | Yesteryear | 09/15/1973 |
| 1 | 3 | One of Our Planets is Missing | 09/22/1973 |
| 1 | 4 | The Lorelei Signal | 09/29/1973 |
| 1 | 5 | More Tribbles, More Troubles | 10/06/1973 |
| 1 | 6 | The Survivor | 10/13/1973 |
| 1 | 7 | The Infinite Vulcan | 10/20/1973 |
| 1 | 8 | The Magicks of Megas-tu | 10/27/1973 |
| 1 | 9 | Once Upon a Planet | 11/03/1973 |
| 1 | 10 | Mudd's Passion | 11/10/1973 |
| 1 | 11 | The Terratin Incident | 11/17/1973 |
| 1 | 12 | The Time Trap | 11/24/1973 |
| 1 | 13 | The Ambergris Element | 12/01/1973 |
| 1 | 14 | The Slaver Weapon | 12/15/1973 |
| 1 | 15 | The Eye of the Beholder | 01/05/1974 |
| 1 | 16 | The Jihad | 01/12/1974 |
| 2 | 17 | The Pirates of Orion | 09/07/1974 |
| 2 | 18 | Bem | 09/17/1974 |
| 2 | 19 | The Practical Joker | 09/21/1974 |
| 2 | 20 | Albatross | 09/28/1974 |
| 2 | 21 | How Sharper Than a Serpent's Tooth | 10/05/1974 |
| 2 | 22 | The Counter-Clock Incident | 10/12/1974 |