Liam Neeson

Mark Felt

Diane Lane

Audrey Felt

Maika Monroe

Joan Felt

Wendi McLendon-Covey

Carol Tschudy

Julian Morris

Bob Woodward

Josh Lucas

Charlie Bates

Tony Goldwyn

Ed Miller

Kate Walsh

Pat Miller

Michael C. Hall

John Dean

Marton Csokas

Pat Gray

Tom Sizemore

Bill Sullivan

Ike Barinholtz

Angelo Lano

Bruce Greenwood

Sandy Smith

Brian d'Arcy James

Robert Kunkel

Noah Wyle

Stan Pottinger

Eddie Marsan

Agency Man

Wayne Péré

John Ehrlichman

Stephen Michael Ayers

John Mitchell

Darryl Cox

Richard Kleindienst

Scott Poythress

Gray's Flack

Jeff Sprauve

Undercover Agent

Frank Hoyt Taylor

Senator #1

Charles Green

Reverend

Michael Crider

Senator #2

John Chancellor

Self (archive footage) (uncredited)

Walter Cronkite

Self (archive footage) (uncredited)

Richard Nixon

Self (archive footage) (uncredited)

Pat Nixon

Self (archive footage) (uncredited)

Jessica Young

Joan's Friend

Spiro Agnew

Self (archive footage - uncredited)

Ricky Wayne

Bill Gardner

L. Warren Young

Juror L.

Jeffrey Dezenski

FBI Director

Kandace Howard

Waitress (as Kandace Michelle Howard)