Tim Robbins as Ed Walters

Meg Ryan as Catherine Boyd

Walter Matthau as Albert Einstein

Lou Jacobi as Kurt Gödel

Gene Saks as Boris Podolsky

Joseph Maher as Nathan Liebknecht

Stephen Fry as James Moreland

Tony Shalhoub as Bob Rosetti

Frank Whaley as Frank

Charles Durning as Louis Bamberger

Keene Curtis as Eisenhower

Alice Playten as Gretchen

Danny Zorn as Dennis

Helen Hanft as Rose

Roger Berlind as Duncan

Arthur Berwick as Academic

Timothy Jerome as Academic

John McDonough as Academic

Lewis J. Stadlen as Moderator

Jeff Brooks as Reporter

Rex Robbins as Suit

Richard Woods as Suit

Daniel von Bargen as Secret Service Agent

Jack Koenig as First Reporter

Sol Frieder as Professor Loewenstein

Michelle Naimo Bird as Nurse

Theodore Conant as Dinner Guest

Scotty Bloch as Dinner Guest

Chet Carlin as Dinner Guest

Alice Drummond as Dinner Guest

Leo Leyden as Dinner Guest

Le Clanché du Rand as Dinner Guest

Brook Berlind as Dinner Guest

Greg Germann as Bill Riley (uncredited)