chunk: The next day, Willard learns from a dispatch that another Studies and Observation Group (SOG) operative, Captain Colby (Scott Glenn), who was sent on an earlier mission identical to Willard's, had joined Kurtz. (A few days before Willard received this dispatch, Chief had told him that about six months prior to Willard's mission Chief had taken another man north of the Do Long Bridge. Chief had heard this man shot himself in the head.) Meanwhile, as the rest of the crew read letters from home, Lance pops open a purple smoke grenade for fun. It attracts the attention of an unseen enemy in the trees, and Mr. Clean is killed during the firefight. Further up the river, they are attacked by the natives once moreâone enemy throws a spear that impales Chief, and in his final moments, he attempts to kill Willard by pulling him down onto the spear's point. Willard retaliates by suffocating him. While Lance buries Chief's body in the river, Willard finally reveals his mission to Chefâdespite