Movies:
All the President's Men

Robert Redford as Bob Woodward: "Supposedly he's got a lawyer with $25,000 in a brown paper bag."

Hal Holbrook as Deep Throat, a.k.a. Mark Felt: "Follow the money."

Redford: "...What do you mean?... Where?"

Holbrook: "Oh, I can't tell you that."

Redford: "But you could tell me that."

Holbrook: "No, I have to do this my way. You tell me what you know, and I'll confirm. I'll keep you in the right direction if I can, but that's all... Just follow the money."