Cast & crew
Dan August: Once Is Never Enough (1980)
Directed by Ralph Senensky, Virgil W. Vogel Written by Robert C. Dennis
Cast
| Ahna Capri | Perry |
| Susan Oliver | Serling |
| Norman Fell | Sgt. Taggart |
| Gerald S. O'Loughlin | Lazar |
| John Lasell | Wedlock |
| Ken Scott | Esseltine |
| Richard Anderson | Untermeyer |
| Tony Colti | Verden Fell (archive footage) |
| Ned Romero | Joe |
| Rusty Lane | Verden Fell (archive footage) |
| Burt Reynolds | August |
| Fritz Weaver | Serling |
| Jerry Ayres | Rodell |
| Jan-Michael Vincent | Colter |
Crew
| Michael Brown | Editor |
| George B. Chan | Art Direction |
| Ralph Senensky | Director |
| Virgil W. Vogel | Director |
| Ben Colman | Director of Photography |
| Carl Biddiscombe | Set Decoration |
| Anthony Spinner | Producer |
| Robert C. Dennis | Writer |
| Quinn Martin | Executive Producer |