Francis Ford Coppola began to film 'Apocalypse Now' in February 1976. After 238 days in the jungle, filming was complete and millions of dollars had been spent (Marlon Brando was on set for three weeks at a million dollars a week). Actors had been replaced (Harvey Keitel by Martin Sheen). They had all gone a bit insane (according to Coppola) and the whole thing was documented on film by his wife, Eleanor.