Head on over to a huge listing of TV shows @ WFMU's Beware of the Blog. Over 150 shows are listed ranging from 1949 to 1988, including
The Ruggles Christmas Episode (1949)
The Adventures of Sherlock Holmes Christmas Episode (1950)
You Asked For It Christmas Episode (1951)
Green Guild Playhouse (1951)
Beat the Clock Christmas Episode (1952)
The Adventures of Ozzie & Harriet Christmas Episode (1952)
Studio One Christmas Episode (1952)
Racket Squad Christmas Episode (1952)
Dragnet Christmas Episode (1952)
The Ray Milland Show Christmas Episode (1953)
The Garry Moore Show Christmas Episode (1953)
The Liberace Show Christmas Episode (1954)
Father Knows Best Christmas Episode (1954 - USA Only)
Meet Corliss Archer Christmas Episode (1954)
The Honeymooners Christmas Episode (1955)
Love That Bob Christmas Episode (1955)
The Bob Hope Show Christmas Episode (1955)
Your Hit Parade Christmas Episode (1955)
What's My Line Christmas Episode (1955)
I Love Lucy Christmas Episode (1956)
Alfred Hitchcock Presents Christmas Episode (1956)
with well over 100 more listed ... if you watch then all, I'll see you at Easter.
