Who's The Boss had some christmas episode throughout their eight year span including the one where Tony accepts a sports card which is gone higher at a sports memorabilia shop was so funny.
but Mash had so many christmas episodes over it's 11 year span was timeless.
Mpi has a TSOD of Christmas episodes that has The Doris Day Show Family Affair The Donna Reed Show and many others it's great.and Warner Archive has a load of Christmas Episodes includes Alice Eight Is Enough Welcome Back Kotter Perfect Strangers and a couple of others it's great.
Head Of The Class has some christmas episodes
the final season has viki's torn genes where viki is trying to find her birth mother but if you watch the beginning where mr.moore was invited by jawhahawl for his thanksgiving dinner.and also Who's The Boss Growing Pains and Perfect Strangers has...