12 O'Clock High Cast
| Image | Actor | Character(s) | # Episodes |
|---|---|---|---|
 | Frank Overton | Major Harvey Stovall | 61 |
 | Paul Burke | Col. Joe Gallagher | 48 |
 | Chris Robinson | Sgt. Sandy Komansky / Lt. Gunther | 47 |
 | Robert Lansing | Brig. Gen. Frank Savage | 32 |
 | Barney Phillips | Major Donald “Doc” Kaiser | 27 |
 | Robert Dornan | Capt. Bob Fowler / Co-pilot / Capt. Johnson / Lt. Porter | 25 |
 | John Larkin | Maj. Gen. Wiley Crowe | 21 |
 | Andrew Duggan | Maj. Gen. Ed Britt | 17 |
 | Lew Gallo | Major Joe Cobb | 14 |
 | Bruce Dern | Lt. Michaels / Lt. Danton / TSgt. Frank Jones | 4 |