David Janssen
David Janssen was born David Harold Meyer in 1931 in Naponee, Nebraska, to Berniece Mae (Graf) and Harold Edward Meyer, a banker. He was of German, and some Swiss-German and Ulster-Scots, descent. David took the surname of his stepfather, Eugene Janssen. The Janssen family settled in Hollywood when he was a teenager and he attended Fairfax High School, where he developed an interest in acting. His film debut was a bit part in It's a Pleasure (1945), and at the age of 18 signed a contract with 20th Century-Fox. However, the studio dropped him after allegedly becoming disenchanted with his odd hairline and big prominent ears. Janssen had better luck at Universal, where he signed on in the early 1950s and became a supporting player in 32 films before appearing on TV as the star of Richard Diamond, Private Detective (1956). He resumed his movie career in 1961, a year after the series ended. His biggest success came from his lead in the series The Fugitive (1963), playing the haunted, hunted Dr. Richard Kimble, on the run for a murder he didn't commit. After the series ended, Janssen launched himself into a grueling schedule by appearing in lead and supporting roles in movies, but he had better luck with made-for-TV-movie roles and a short-lived series, O'Hara, U.S. Treasury (1971). He had another hit series with the cult favorite Harry O (1973). Janssen continued appearing in lead roles in nearly 20 made-for-TV-movies during the 1970s as well as other TV projects. He died in 1980 from a sudden heart attack at his Malibu home at the age of 48. Unfounded speculation holds that Janssen succumbed to alcoholism, a problem that plagued him most of his adult life. There were even unfounded rumors about drug use. However, a much more reasonable explanation for David Janssen's sudden demise is that this intense, dedicated, determined actor simply worked himself to death.
From an IMDB Mini-Bio for David Janssen

Chief Crazy Horse

The Green Berets

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Marooned

Cult of the Cobra

King of the Roaring 20's – The Story of Arnold Rothstein

Hell to Eternity

The Swiss Conspiracy

Francis in the Navy

To Hell and Back

Golden Rendezvous

Moon of the Wolf

Los Angeles Plays Itself

Man-Trap

Birds of Prey

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City in Fear

Smile Jenny, You're Dead

S.O.S. Titanic

Generation

Twenty Plus Two

Warning Shot

Once Is Not Enough

Where It's At

Fer-de-Lance

The Private War of Major Benson

Ring of Fire

Covert Action

Inchon

Showdown at Abilene

Lafayette Escadrille

No Room for the Groom

Dondi

Never Say Goodbye

High Ice

Warhead

My Six Loves

Pioneer Woman

Hijack!

Francis in the Haunted House

Toy Tiger

Nowhere to Run

Mayday at 40,000 Feet

Superdome

The Shoes of the Fisherman

The Square Jungle

The New March of Dimes Presents: The Scene Stealers

Macho Callahan

A Sensitive, Passionate Man

All That Heaven Allows

Night Chase

The Girl He Left Behind

Such Dust as Dreams Are Made On

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Francis Goes to West Point

The Golden Gate Murders

Joys

The Longest Night

Belle Sommers

O'Hara, United States Treasury: Operation Cobra

Stalk the Wild Child

Cain's Hundred

Naked City

The Merv Griffin Show

Cannon

Centennial

Target: The Corruptors!

Harry O

Police Story

The Fugitive

The Millionaire

The Hollywood Palace

Rowan & Martin's Laugh-In
Lux Video Theatre

Richard Diamond, Private Detective

Route 66
Lux Video Theatre

Adventures in Paradise

General Electric Theater

The Eleventh Hour

Westinghouse Desilu Playhouse
O'Hara, U.S. Treasury

Matinee Theater

Alcoa Theatre

Dick Powell's Zane Grey Theatre

Dick Powell's Zane Grey Theatre

Naked City

The Millionaire

Dinah!

The Mike Douglas Show

The Word

Checkmate

U.S. Marshall

The Dick Powell Show

The Mike Douglas Show

Whack-O!
Best of The Dean Martin Variety Show

The Adventures of Boston Blackie

The Tonight Show Starring Johnny Carson
