
Los Angeles, California, USA
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.

as Reynolds Penland (voice) (uncredited)

as Self
1962

as Self - Co-Host
1961

as Reynolds Penland (voice) (uncredited)
1997

as Roland Saunders
1981

as Chester Harrison
1984

as Peter McReynolds
1993

as Bret Garrett
1977

as Self
1944

as Self
1962

as Lewis Blackwood
1982

as Eliot Ness
1959
as Major Morgan
1963
as (archive footage)
2019

as Self (archive footage)
2023

2021

as (archive footage)
2019

as (archive footage)
2018
as Self (archive footage)
2008

as Host
2004

as Self
2001

as The Gooch
2001

as Superintendent (voice)
2001

as Himself
1999

as Sumner Ethridge
1999

as Narrator (voice) (archive sound)
1999

as Host
1999

as Robert Stack
1998

as Self
1997

as Agent Flemming (voice)
1996

as Self
1996

as Eliot Ness
1991
as Lt. Littleboy (voice)
1991

as Dr. Ellison
1990

as Louis Faciano
1988

as Chandler Young
1988

as Mr. Gardner
1988

as Jordan White
1987
as Reynolds Penland (voice) (uncredited)
1 ep.

as Self
7 episodes

as Self - Co-Host
5 episodes

as Reynolds Penland (voice) (uncredited)
1 episodes

as Roland Saunders
5 episodes

as Chester Harrison
1 episodes

as Peter McReynolds
1 episodes

as Bret Garrett
1 episodes

as Self
1 episodes

as Self
1 episodes

as Lewis Blackwood
1 episodes

as Eliot Ness
118 episodes
as Major Morgan
1 episodes

as Agent Briggs
1 episodes

as Self / Bo Bo McGoon
1 episodes

as Self
1 episodes

as Bob (voice)
65 episodes

as Dan Farrell
26 episodes

as Robert Stack
1 episodes

as Self
1 episodes

2 episodes

as Self
2 episodes

as Self - Cameo
1 episodes

as Narrator (voice)
1 episodes

as Self
1 episodes