Atlantis survivor Mark Harris breathes underwater, withstands extreme depth pressures and wields superhuman strength.
| Title | Time | |
|---|---|---|
| 1 | Melt Down | 1977-09-22 |
| 2 | The Mudworm | 1977-10-13 |
| 3 | The Hawk of Mu | 1977-10-18 |
| 4 | Giant | 1977-10-25 |
| 5 | Man O' War | 1977-11-01 |
| 6 | Shoot-Out at Land's End | 1977-11-08 |
| 7 | Crystal Water, Sudden Death | 1977-11-22 |
| 8 | The Naked Montague | 1977-12-06 |
| 9 | C.W. Hyde | 1977-12-13 |
| 10 | Scavenger Hunt | 1978-04-18 |
| 11 | Imp | 1978-04-25 |
| 12 | The Siren | 1978-05-02 |
| 13 | Deadly Carnival | 1978-06-06 |
