La conversación

The blue Mercedes limousine that Cindy Williams is sitting in near the end of the film was won by Francis Ford Coppola on a bet with Paramount Pictures. Coppola had complained about the station wagon he shared with five other passengers during the filming of El padrino (1972). Studio executives told him that if The Godfather had grossed a certain amount, they would spring for a new car. After The Godfather became the highest grossing film of all time, Coppola and George Lucas went to a dealer and picked out the Mercedes, telling the salesman to bill Paramount Pictures.

When Caul is in Stett's office alone, he walks over to the desk and picks up one of Stett's wife's cookies. He smells it and puts it back in the dish and then looks through the telescope. When Stett returns, he hands Caul the money and takes the tapes. When the film cuts to a shot of Caul thinking about the arrangement, the cookie reappears. Caul puts this cookie back in the dish, too.

Edited into The Green Fog (2017)