The Manhattan Project

The Manhattan Project Cast

56 cast members · 25 with popularity data

Most Popular The Manhattan Project Cast Members

John Lithgow is currently the most popular The Manhattan Project cast member online with a Attention Score of 3.5. Updated August 26, 2026.

Background (uncredited)

Robert Sean Leonard

Richard Jenkins

Radiation Controls Officer

Lt. Col. Conroy

Laser Efficiency Kid (as Richard Cardona)

Jill Eikenberry

Elizabeth Stephens

#14,417 overall

Timothy Carhart

#14,893 overall

#15,943 overall

Robert Schenkkan

Government Aide

#15,935 overall

#16,601 overall

#17,286 overall

C-4 Guy (uncredited)

#24,045 overall

Christopher Collet

#29,060 overall

#33,214 overall

Science Teacher

#33,305 overall

Eccles (as John David Cullum)

#34,215 overall

#36,471 overall

Richard Council

Government Aide

#48,910 overall

#49,364 overall

#57,477 overall

#59,814 overall

#62,705 overall

Roland (as Abe Unger)

Geoffrey Nauffts

Katherine Hiler

Harlan Cary Poe

Jenny's Brother

Jenny's Brother

Conroy's Lieutenant

Price (as Charlie Fields)

Heather Rose Dominic

Bruce Smolanoff

Injection Doctor

FBI (as Alec Massey)

Edward D. Murphy

Barbara Collins - TV Reporter

Helicopter Pilot

Michael Telesco

Day Security Receptionist

Richard Caselnova

Frank Ferrara Sr.

Jimmie Ray Weeks

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