Robert Langford Modini Stack 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.
2023
as Self (archive footage)
2019
as (archive footage)
2018
as (archive footage)
2008
as Self (archive footage)
2004
as Host
2002
as Stoat Muldoon (voice)
2001
as Self
2001
as The Gooch
2001
as Superintendent (voice)
1999
as Himself
1999
as Sumner Ethridge
1999
as Narrator (voice) (archive sound)
1999
as Host
1998
as Bob (voice)
1998
as Robert Stack
1997
as Self
1997
as Narrator (voice)
1997
as Reynolds Penland (voice) (uncredited)
1996
as Agent Flemming (voice)
1996
as Robert Stack
1996
as (archive)
1993
as Peter McReynolds
1991
as Eliot Ness
1991
as Lt. Littleboy (voice)
1990
as Robert Stack (uncredited)
1990
as Kyle Hadley
1990
1990
as Dr. Ellison
1988
as Host
1988
as Louis Faciano
1988
as Chandler Young
1988
as Mr. Gardner
1987
as Jordan White
1986
as Ultra Magnus (voice)
1986
as Winslow
1985
as Drew Hammond
1985
as George Lancaster
1984
as Chester Harrison
1984
1984
as General Stark
1983
as MacGregor
1982
as Self
1982
as Lewis Blackwood
1982
as Charles Vandoor
1981
as Roland Saunders
1981
as Captain Frank Murphy
1980
as Captain Rex Kramer
1980
as Self
1979
as Maj. Gen. Joseph W. Stilwell
1979
as Host - Narrator
1979
as Self
1978
as François Davis
1977
as Bret Garrett
1976
as Captain Linc Evers
1975
as Captain Larkin
1975
as Capt. James Morgan
1974
as Self
1974
as Michael Rhodes
1973
as Self
1973
1971
as Self
1971
as Self (archive footage)
1970
as David Frasier
1968
as Dan Farrell
1968
as Mark McPherson
1967
as Angelo (Businessman)
1967
as Jim Beckley
1967
as Cliff Wilder
1966
as General Sibert
1965
as James Andrew Congers
1963
as Dr. Donovan MacLeod
1962
as Agent Briggs
1960
as Cliff Henderson
1959
as Eliot Ness
1959
as John Paul Jones
1959
as Eliot Ness
1958
as William 'Bill' Beck
1957
as Roger Shumann
1956
as Kyle Hadley
1956
as Owen Pentecost
1955
as Dr. Tommy Baker
1955
as Mark Macpherson
1955
as Mark MacPherson
1955
as Eddie Kenner
1954
as John Sullivan
1954
as Captain Charles Wogan
1953
as Col. Gil Manton
1953
as Maj. Tom Burke
1953
as Lt. Billings
1953
as Self
1952
as Ralph Saunders
1952
as Ben Barton
1952
as Bob Hayward
1951
as Vic Flint
1951
as Patrick O´Moore
1951
as John Regan
1950
as Jeff Blake
1950
as First Man
1950
as Self - Intermission Guest
1950
1949
1948
as Capt. Stuart L. Hamilton
1948
as Nickey Van Alen
1948
as Stephen Andrews
1943
as Himself
1942
as Bob - Factory worker
1942
as Barry Conovan
1942
as Chuck S. Brewer
1942
as Lieut. Stanislav Sobinski
1941
as Jim Holliday
1941
as Self
1941
as Don Webb
1940
as Bob Terry
1940
as Otto Von Rohn
1939
as Ted Drake