
Acting
Harold Clifford Keel (April 13, 1919 – November 7, 2004), known professionally as Howard Keel, was an American actor and singer. He starred in many film musicals of the 1950s. He is best known to modern audiences for his starring role in the CBS television series Dallas from 1981 to 1991, as Clayton Farlow, opposite Barbara Bel Geddes's character, but to an earlier generation, he was known as the star of some of the most famous MGM film musicals ever made, with a rich baritone singing voice.
Description above from the Wikipedia article Howard Keel, licensed under CC-BY-SA,full list of contrib…

Hollywood Singing and Dancing: A Musical History - The 1950s: The Golden Era of the Musical
as Self (archive)

Frankie Laine: An American Dreamer
as Self
Cole Porter in Hollywood: Too Darn Hot
as Self
Sobbin' Women: The Making of 'Seven Brides for Seven Brothers'
as Himself - Host

Inside the Dream Factory
as Self

That's Entertainment! III
as Self - Co-Host / Narrator

Hart to Hart: Home Is Where the Hart Is
as Capt. Quentin "Jack" Jackson

Creepy Classics
as Bill Masen - (archive footage)

That's Dancing!
as From 'Kiss Me Kate' (archive footage)

Royal Variety Performance 1984

Legends
as Wild Bill Hickok (archive footage) (uncredited) · 1 ep.

Walker, Texas Ranger
as D. L. Dade · 1 ep.

Good Sports
as Sonny Gordon · 2 ep.

Murder, She Wrote
as Larry Thorson · 1 ep.

Dallas
as Clayton Farlow · 222 ep.

The Love Boat
as Duncan Harlow · 1 ep.

The Quest
as Shanghai Pierce · 1 ep.

Great Performances
as Self · 1 ep.

Here's Lucy
as Stanley Livingston · 1 ep.

Run for Your Life
as Hardie Rankin · 1 ep.
The Day of the Triffids
1963