| Season One | 17 color episodes in 60 minute format | |||
|---|---|---|---|---|
| Ep | PN | Airdate | Title | |
| 1 | Jan 10/67 | Beachhead | ||
| 2 | Jan 17/67 | The Experiment | ||
| 3 | Jan 24/67 | The Mutation | ||
| 4 | Jan 31/67 | The Leeches | ||
| 5 | Feb 07/67 | Genesis | ||
| 6 | Feb 14/67 | Vikor | ||
| 7 | Feb 21/67 | Nightmare | ||
| 8 | Feb 28/67 | Doomsday Minus One | ||
| 9 | Mar 07/67 | Quantity: Unknown | ||
| 10 | Mar 14/67 | The Innocent | ||
| 11 | Mar 21/67 | The Ivy Curtain | ||
| 12 | Mar 28/67 | The Betrayed | ||
| 13 | Apr 04/67 | Storm | ||
| 14 | Apr 11/67 | Panic | ||
| 15 | Apr 18/67 | Moonshot | ||
| 16 | May 02/67 | Wall of Crystal | ||
| 17 | May 09/67 | The Condemned | ||
| Season Two | 26 color episodes in 60 minute format | |||
|---|---|---|---|---|
| Ep | PN | Airdate | Title | |
| 18 | Sep 05/67 | Condition: Red | ||
| 19 | Sep 12/67 | The Saucer | ||
| 20 | Sep 19/67 | The Watchers | ||
| 21 | Sep 26/67 | Valley of the Shadow | ||
| 22 | Oct 03/67 | The Enemy | ||
| 23 | Oct 10/67 | The Trial | ||
| 24 | Oct 17/67 | The Spores | ||
| 25 | Oct 24/67 | Dark Outpost | ||
| 26 | Oct 31/67 | Summit Meeting | ||
| 27 | Nov 07/67 | Summit Meeting, Part 2 | ||
| 28 | Nov 14/67 | The Prophet | ||
| 29 | Nov 21/67 | Labyrinth | ||
| 30 | Nov 28/67 | The Captive | ||
| 31 | Dec 05/67 | The Believers | ||
| 32 | Dec 12/67 | The Ransom | ||
| 33 | Dec 26/67 | Task Force | ||
| 34 | Jan 02/68 | The Possessed | ||
| 35 | Jan 09/68 | Counterattack | ||
| 36 | Jan 16/68 | The Pit | ||
| 37 | Jan 30/68 | The Organization | ||
| 38 | Feb 06/68 | The Peacemaker | ||
| 39 | Feb 20/68 | The Vise | ||
| 40 | Feb 27/68 | The Miracle | ||
| 41 | Mar 05/68 | The Life Seekers | ||
| 42 | Mar 12/68 | The Pursued | ||
| 43 | Mar 26/68 | Inquisition | ||
| Miniseries | 2 color episodes in 120 minute format | ||
|---|---|---|---|
| Ep | PN | Airdate | Title |
| Nov 12/95 | The Invaders, Part 1 | ||
| Nov 14/95 | The Invaders, Part 2 | ||
