Noah Wyle

as Sitter 20

as Dr. Michael 'Robby' Robinavitch

as Peter Barris

as Self

as Harry Wilson

as Self

as Daniel Calder

as Ivan

as Self

as Stan Pottinger

as Mark Newman

as Lewis Alcindor

as Self

as Self

as Leonard

as Flynn Carsen

as Martin the News Vendor (voice)

as Arthur Spear

as Thomas Nast

as Dr. Evans

as Thomas 'Tom' Mason

as Aaron Lambert

as Self

as Hunter Patrick

as Self

as Avril Aaronson

as Mike Stafford

as Flynn Carsen

as Don Evans

as Martin the News Vendor (voice)

as Flynn Carsen

as Gavin Ransom

as Self

as Flynn Carsen

as Self

as Self

as Mark Richards

as Robbie

as Seth

as Self

as Prof. Kenneth Monnitoff

as Buck

as Self

as Steve Jobs

as Poe

as Warren

as Self

as Self

as Jeffrey Rosen

as John Carter

as Finnegan

as Lancelot

as Emil Lutz

as Cpl. Jeffrey Barnes

as Ask Warren

as Young Man (uncredited)

as Self

as Self - Cameo (uncredited)

as Self