- Made his (unbilled) film debut at 14 in Sonja Henie's It's a Pleasure, playing Davey, a boy referee.
- Signed at 18 to a 20th Century Fox contract, later dropped; signed by Universal, appeared in over 30 supporting roles before his big break, starring in the TV series Richard Diamond, Private Detective (1957-60).
- The Richard Diamond series was produced by Four Star, whose owner, Dick Powell, had played the private detective on radio (1949-52) and chose Janssen to play the role on TV.
- Most popular role was Dr. Richard Kimble in The Fugitive (1963-67); its final episode drew a then-record audience.
- Tested to play Nicky Arnstein, opposite Barbra Streisand, in Funny Girl (after Streisand refused to take second billing to first choice Frank Sinatra).
- Died of a heart attack at 48; among his pallbearers were Gene Kelly, Gregory Peck, Milton Berle, Richard Harris and Rod Stewart.
- 1964, Emmy — Outstanding Continued Performance by an Actor in a Series: Nominee
- 1961, Golden Globe — New Star of the Year - Actor: Nominee
- 1966, Emmy — Outstanding Continued Performance by an Actor in a Leading Role in a Dramatic Series: Nominee
- 1967, Emmy — Outstanding Continued Performance by an Actor in a Leading Role in a Dramatic Series: Nominee
- 1965, Golden Globe — Actor in a Television Series: Nominee
- 1966, Golden Globe — Actor in a Television Series: Winner
- Dani Crayne — Wife
- Berniece Janssen — Mother
- Harold Meyer — Father
- Ellie Graham — Ex-wife
- Eugene Janssen — Stepfather
- Jill Janssen — Half Sister
- Teri Janssen — Half Sister
Ranking Big Bang Theory's Guest Stars
From Stan Lee to Leonard Nimoy, check out the greatest cameos on the CBS sitcom
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