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| Aflevering | Eerste uitzending |
|---|---|
| S04E01 - The Return of Bigfoot (1) | 19/09/1976 |
| S04E02 - The Return of Bigfoot (2) | 22/09/1976 |
| S04E03 - Nightmare in the Sky | 26/09/1976 |
| S04E04 - Double Trouble | 03/10/1976 |
| S04E05 - The Most Dangerous Enemy | 17/10/1976 |
| S04E06 - H+2+O = Death | 24/10/1976 |
| S04E07 - Kill Oscar (2) | 31/10/1976 |
| S04E08 - The Bionic Boy | 31/10/1976 |
| S04E09 - Vulture of the Andes | 21/11/1976 |
| S04E10 - The Thunderbird Connection | 28/11/1976 |
| S04E11 - A Bionic Christmas Carol | 12/12/1976 |
| S04E12 - Task Force | 19/12/1976 |
| S04E13 - The Ultimate Imposter | 02/01/1977 |
| S04E14 - Death Probe (1) | 09/01/1977 |
| S04E15 - Death Probe (2) | 16/01/1977 |
| S04E16 - Danny's Inferno | 23/01/1977 |
| S04E17 - Fires of Hell | 30/01/1977 |
| S04E18 - The Infiltrators | 06/02/1977 |
| S04E19 - Carnival of Spies | 13/02/1977 |
| S04E20 - U-509 | 20/02/1977 |
| S04E21 - The Privacy of the Mind | 27/02/1977 |
| S04E22 - To Catch the Eagle | 06/03/1977 |
| S04E23 - The Ghostly Teletype | 15/05/1977 |