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 3.8. Updated August 5, 2026.

Robert Sean Leonard

Lt. Col. Conroy

Richard Jenkins

Radiation Controls Officer

Laser Efficiency Kid (as Richard Cardona)

Background (uncredited)

#14,211 overall

#17,782 overall

#17,792 overall

Jill Eikenberry

Elizabeth Stephens

#20,213 overall

Timothy Carhart

#23,093 overall

C-4 Guy (uncredited)

#24,729 overall

Robert Schenkkan

Government Aide

#25,128 overall

Christopher Collet

#25,662 overall

Eccles (as John David Cullum)

#27,126 overall

Science Teacher

#32,290 overall

#36,048 overall

#44,241 overall

Richard Council

Government Aide

#44,762 overall

#45,520 overall

#50,761 overall

#62,562 overall

#62,892 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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