
Robert Langford Modini Stack (January 13, 1919 – May 14, 2003) was a multilingual American actor and television host. In addition to acting in more than 40 films, he also appeared on the television series The Untouchables and later served as the host of Unsolved Mysteries. Born in Los Angeles, California, Stack spent his early childhood growing up in Europe. Becoming fluent in French and Italian at an early age, and he did not learn English until returning to Los Angeles. Stack achieved minor fame in sporting, winning multiple championships including setting two world records and winning multiple honors in skeet shooting Stack studied drama at Bridgewater State College, earning his first Hollywood role at the age of 20 and continuing to star in numerous roles throughout the early 1940s. After serving in the military, Stack returned to Hollywood to star in numerous films including stand out roles in The High and the Mighty (opposite John Wayne) and Written on the Wind (1957), for which he was awarded an Academy Award for Best Supporting Actor. Stack later moved on to televised dramatic series, depicting the crime-fighting Eliot Ness in The Untouchables (1959–1963), which earned him a best actor Emmy Award in 1960. Stack also starred in multiple drama series, before returning to film, this time in comedies to satirize his famed stoic and humorless demeanor. He began hosting Unsolved Mysteries in 1987, and served as the show's host throughout it's entire original run from 1987 to 2002.

Lieut. Stanislav Sobinski
To Be or Not to Be

Otto Von Rohn
The Mortal Storm

Captain Rex Kramer
Airplane!

Agent Flemming (voice)
Beavis and Butt-Head Do America

Dr. Ellison
Joe Versus the Volcano

General Sibert
Paris brûle-t-il?

Dr. Tommy Baker
Good Morning, Miss Dove

Eddie Kenner
House of Bamboo

Maj. Gen. Joseph W. Stilwell
1941

Himself
Mumford

Patrick O´Moore
My Outlaw Brother

Self
Douglas Sirk: Über Stars

MacGregor
Uncommon Valor

Don Webb
Nice Girl?

Cliff Henderson
The Last Voyage

Ted Drake
First Love

Bob Hayward
Bwana Devil

Roger Shumann
The Tarnished Angels

Chandler Young
Caddyshack II

John Sullivan
The High and the Mighty

Kyle Hadley
Written on the Wind

Self
The Grand Opening of Walt Disney World

John Paul Jones
John Paul Jones

(archive footage)
These Dead Souls

Michael Rhodes
The Strange and Deadly Occurrence

Louis Faciano
Dangerous Curves

Owen Pentecost
Great Day in the Morning

Dr. Donovan MacLeod
The Caretakers

Jim Holliday
Badlands of Dakota

Jim Beckley
Le Soleil des voyous

John Regan
Bullfighter and the Lady

Stephen Andrews
A Date with Judy

Host
The Y2K Crisis

Winslow
Big Trouble

Barry Conovan
Men of Texas

Capt. Stuart L. Hamilton
Fighter Squadron

Col. Gil Manton
Sabre Jet

Sumner Ethridge
Sealed with a Kiss

Capt. James Morgan
Adventures of the Queen

Captain Larkin
Murder on Flight 502

Jeff Blake
Mr. Music

Narrator (voice) (archive sound)
Hercules: Zero to Hero

Lt. Billings
War Paint

Self
Barry Norman in Celebrity City

Maj. Tom Burke
Conquest of Cochise

William 'Bill' Beck
The Gift of Love

Mark McPherson
Laura

Self
Screen Snapshots Series 21 No. 1

Eliot Ness
The Scarface Mob

Captain Charles Wogan
The Iron Glove

Self (archive footage)
Acting for Douglas Sirk

(archive footage)
Yellowface: Asian Whitewashing and Racism in Hollywood

Mr. Gardner
Plain Clothes

Ultra Magnus (voice)
The Transformers: The Movie

James Andrew Congers
Asylum for a Spy

Bob Terry
A Little Bit of Heaven

Drew Hammond
Midas Valley

Cliff Wilder
Die Hölle von Macao

Host
Unsolved Mysteries Volume 1: UFOs

Nickey Van Alen
Miss Tatlock's Millions

Self
Barbara Stanwyck: Straight Down The Line

François Davis
Un Second Souffle

Host - Narrator
Undercover with the KKK

Chuck S. Brewer
Eagle Squadron

Lt. Littleboy (voice)
The Real Story of Baa Baa Black Sheep

Riviera Dream

The Gooch
Killer Bud

Jordan White
Perry Mason: The Case of the Sinister Spirit

Robert Stack
BASEketball

Bob - Factory worker
Keeping Fit

Himself
Screen Snapshots (Series 23, No. 1): Hollywood in Uniform

David Frasier
Storia di una donna

Superintendent (voice)
Recess: School's Out

Self (archive footage)
The Selling of the Pentagon

Self
Lana Turner... a Daughter's Memoir

Mark Macpherson
Laura

Self
The Muppets Go Hollywood

Eliot Ness
The Return of Eliot Ness

Self (archive footage)
Unsolved Mysteries: Behind the Legacy

Self
Clark Gable: Tall, Dark, and Handsome

My Kingdom For...

Self
Happy 100th Birthday, Hollywood
Known For
Acting
Known Credits
82
Gender
Male
Birthday
1919-01-13
Place of Birth
Los Angeles, California, USA
Also Known As
Роберт Стэк