
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 Ultra Magnus (archived audio)

as Self (archive footage)

as (archive footage)

as (archive footage)

as Self (archive footage)

as The Gooch

as Superintendent (voice)

as Robert Stack

as Sumner Ethridge

as Narrator (voice) (archive sound)

as Host

as Robert Stack

as Agent Flemming (voice)

as Eliot Ness

as Lt. Littleboy (voice)

as Dr. Ellison

as Louis Faciano

as Chandler Young

as Mr. Gardner

as Jordan White

as Ultra Magnus (voice)

as Winslow

as Drew Hammond

as MacGregor

as Captain Rex Kramer

as Self

as Maj. Gen. Joseph W. Stilwell

as Host - Narrator

as Self (uncredited)

as François Davis

as Captain Larkin

as Capt. James Morgan

as Michael Rhodes

as Self (archive footage)

as David Frasier

as Mark McPherson

as Jim Beckley

as Cliff Wilder

as General Sibert

as James Andrew Congers

as Dr. Donovan MacLeod

as Eliot Ness

as Eliot Ness

as Cliff Henderson

as Eliot Ness

as John Paul Jones

as William 'Bill' Beck

as Jerry Cook

as Roger Shumann

as Kyle Hadley

as Owen Pentecost

as Dr. Tommy Baker

as Mark Macpherson

as Eddie Kenner

as John Sullivan

as Captain Charles Wogan

as Col. Gil Manton

as Maj. Tom Burke

as Lt. Billings

as Bob Hayward

as Patrick O´Moore

as John Regan

as Jeff Blake

as Capt. Stuart L. Hamilton

as Nickey Van Alen

as Stephen Andrews

as Bob - Factory worker

as Barry Conovan

as Chuck S. Brewer

as Lieut. Stanislav Sobinski

as Jim Holliday

as Don Webb

as Bob Terry

as Otto Von Rohn

as Ted Drake