A Major noted for advancing with his mouth before thinking is given a choice: to be drummed out of the Army, or take command of and shape up the ROTC program at Sheridan Academy before it fails its next inspection. At Sheridan he encounters three hundred pre-teen cadets who range from rascally to adorable, and a female doctor who has just the right prescription for him.
| Actor | Role |
|---|---|
 Charlton HestonMaj. Bernard R. 'Barney' Benson | Maj. Bernard R. 'Barney' Benson |
 Julie AdamsDr. Kay Lambert | Dr. Kay Lambert |
 William DemarestJohn | John |
 Tim HoveyCadet Thomas 'Tiger' Flaherty | Cadet Thomas 'Tiger' Flaherty |
 Nana BryantMother Redempta | Mother Redempta |
 Tim ConsidineCadet Lt. Gerald Hibler | Cadet Lt. Gerald Hibler |
 Sal MineoCadet Col. Sylvester Dusik | Cadet Col. Sylvester Dusik |
 Milburn StoneMaj. Gen. Wilton J. Ramsey | Maj. Gen. Wilton J. Ramsey |
| MMary FieldSister Mary Theresa | Sister Mary Theresa |
 Joey D. VieiraCadet Cpl. Scawalski (as Donald Keeler) | Cadet Cpl. Scawalski (as Donald Keeler) |
| GGary PagettCadet Lt. Molony | Cadet Lt. Molony |
 Don HaggertyHarold Hibler | Harold Hibler |
 David JanssenYoung Lieutenant | Young Lieutenant |
 Richard H. CuttingMonsignor Collins | Monsignor Collins |
 Sue GeorgeNancy (uncredited) | Nancy (uncredited) |
| SSteven BensonCadet | Cadet |
| MMadge BlakeWoman at Airport | Woman at Airport |
| AAlfred CaiazzaCadet Lt Morelli (uncredited) | Cadet Lt Morelli (uncredited) |