The Neptune Factor
When an underwater ocean lab is lost in a earthquake, an advanced submarine is sent down to find it and encounters terrible danger.
| Actor | Role |
|---|---|
 Ben GazzaraCmdr. Adrian Blake | Cmdr. Adrian Blake |
 Walter PidgeonDr. Samuel Andrews | Dr. Samuel Andrews |
 Ernest BorgnineChief Diver Don MacKay | Chief Diver Don MacKay |
 Yvette MimieuxDr. Leah Jansen | Dr. Leah Jansen |
 Donnelly RhodesDiver Bob Cousins | Diver Bob Cousins |
 Chris WigginsCapt. Williams | Capt. Williams |
 Michael J. ReynoldsDr. Hal Hamilton | Dr. Hal Hamilton |
 Mark WalkerDiver Dave Moulton | Diver Dave Moulton |
 Leslie CarlsonBrigs, Triton Radioman | Brigs, Triton Radioman |
 Stuart GillardDiver Phil Bradley | Diver Phil Bradley |
| EEd McGibbonDr. Norton Shepherd | Dr. Norton Shepherd |
| DDavid RentonWarrant Officer | Warrant Officer |
 Joan GregsonDobson | Dobson |
| DDavid YorstonDiver Stephens | Diver Stephens |
 Ken PogueDiver Thomas | Diver Thomas |
| DDave MannHawkes | Hawkes |
| FFrank PerrySub Captain | Sub Captain |
 Kei FujiwaraKay, lab technician | Kay, lab technician |
 Dan MacDonaldLt. Hobbs, Halifax day officer | Lt. Hobbs, Halifax day officer |
| RRichard WhelanRadio Officer | Radio Officer |