This docudrama follows the court-martial of the title character, the man held responsible for the My Lai massacre during the Vietnam War.
| Actor | Role |
|---|---|
 Tony MusanteLt. William Calley | Lt. William Calley |
 Richard BasehartGeorge Latimer | George Latimer |
 Linda HaynesCalley's Girl | Calley's Girl |
 Bo HopkinsProsecuting attorney | Prosecuting attorney |
 Harrison FordFrank Crowder | Frank Crowder |
 William LuckingThe Captain | The Captain |
 Frank McRaeMr. Langham | Mr. Langham |
 G.D. SpradlinMilitary Judge | Military Judge |
| RRob ReeceWitness | Witness |
 Stanley KramerHost | Host |
 Geoffrey HorneMartin Peters | Martin Peters |
 Fredd WayneNot listed | Not listed |