Aidan Quinn

as Father MacGabbhan

as Theodore Parker (voice)

as Bruce

as Self

as Gabriel Robinson

as John Wilson

as Self (archive footage)

as Moody Burkhart

as Self (archive footage)

as Dermot

as Cameron Brogden

as Derek

as John

as Adem

as Sandy

as Matt Davidson

as Lieutenant Colonel Owens

as Martin B.

as Henry Brown

as Himself

as Richard Baker

as Ulysses S. Grant

as Steven Abbate

as William Rainsferd

as Charlie Wright

as Narrator

as Nicholas Holden

as Alec

as Prof. Porter

as Self - Host

as Gerry Moore

as Jacob Reiser

as Charlie Hamilton

as Frank Brennan

as Henry Dawes

as Kerry Max Cook

as Henry

as John Berry

as Douglas Thomas

as Commodore Alfred Lind

as Harry Vardon

as Tom Guthrie

as Detective Scofield

as Frank Nitzche

as Joe F. Brown

as Clint Windsor

as William Franklin

as Gen. Benedict Arnold

as Joe O'Malley

as Nick Barron

as Tom Bledsoe

as Miles Hendon

as Paul McCartney

as Brian

as Paul Cooper

as Kieran O'Day

as Gary Hallet

as Annibal Ramirez / Carlos

as Seth Warner

as Henry Morton Stanley

as Richmond

as Harry Roland

as Professor David Ash

as (segment "John Boorman")

as Maurice Woulfe (voice)

as Don Day

as Alfred Ludlow

as Cap. Robert Walton

as Benjamin 'Benny' Pearl

as Detective John Hallstrom

as Tom Casey

as Bob Finkbine

as James McEwan / Jonathan McEwan

as Martin Quarrier

as Jules Kaye

as Nick

as Frankie McGuinness

as Samuel De Valera Paxton

as Crusoe

as Chris Keller

as Richard "Stick" Montgomery

as Felipe Mendoza

as Dez

as Michael Pierson

as Johnny Rourke

as John Umley

as Barnet Rosset

as Bishop Ryan

as Professor Tigues

as Daddy Walsh

as Roger Laver

as Theodore Roosevelt

as Thomas Gregson

as Kevin Sweeney

as Gus Vanderlip

as Professor George Oswald

as Matt Furey

as Daniel Webster

as CEO

as David Roby

as Jeremy Bell (segment "The Passenger List")

as Ben Nicholson

as John Miller

as Self

as (voice)

as Self - Guest

as Self - Guest

as Self

as Tom Guthrie