Lucy & Desi's Lost Christmas Special
One of my favorite TV websites, TVParty!, has a super article up about Lucy & Desi's Lost Christmas Special. This 1959 special has never been re-broadcast and stars the cast of "I Love Lucy" along with a gaggle of celebrities including George Murphy, Danny Thomas, Ann Sothern, Hedda Hopper and Lassie.
This Desilu Christmas special was produced and (essentially) directed by Lucille Ball herself. This is the only Desilu production I can think of that features the I Love Lucy cast members playing "themselves."
Read the article (and see clips) here:
http://tvparty.com/xmaslucy.html