Part 2 of four. Trusted as the White House lawyer, John Dean (Martin Sheen) becomes, in his words, "the idea man [to] contain scandals that could bring down the Administration." President Nixon: Rip Torn. Maureen: Theresa Russell. Ehrlichman: Graham Jarvis. Mitchell: John Randolph. Haldeman: Lawrence Pressman. Kalmbach: William Schallert.