•
Martin Sheen as John Dean, Nixon White House counsel and coordinator of the Watergate cover-up turned star witness •
Rip Torn as President
Richard Nixon •
Theresa Russell as Maureen Dean •
William Daniels as
G. Gordon Liddy, former FBI agent, one of the head
White House Plumbers and one of the
Watergate Seven •
Graham Jarvis as
John Ehrlichman, Nixon chief domestic advisor •
John Randolph as
John Mitchell, former Attorney General •
Lawrence Pressman as
H.R. "Bob" Haldeman, Nixon White House Chief of Staff •
Ed Flanders as Charlie Shaffer, Dean's lawyer •
Peter Mark Richman as
Robert Mardian, political CRP coordinator •
James Sloyan as
Ronald Ziegler, Nixon White House press secretary •
William Windom as
Richard Kleindienst, Attorney General succeeding Mitchell •
Lonny Chapman as
L. Patrick Gray, acting FBI director •
Christopher Guest as
Jeb Stuart Magruder, CRP coordinator turned witness •
James Karen as
Earl Silbert, federal prosecutor •
Kip Niven as
Egil "Bud" Krogh, Nixon executive assistant who worked with the White House Plumbers •
Michael Callan as
Charles Colson, Nixon White House counsel preceding Dean •
David Sheiner as
Samuel Dash, Georgetown law professor and chief counsel to the
Senate Watergate Committee ==References==