There was an epsidode that was about Father Mulchavy and he was feeling bad that he was not makeing a difference and Winchester was upset because he missed home It was a Christmas episode and at the end they sing a song. What is the name of the episode?http://www.tvtome.com/images/shows/6/3/57-4015.jpg

"Dear Sis" from Season 7.

Episode 158.

Father Mulcahy writes a pre-Christmas letter to his sister, who is a nun. He recounts his frustrations at not being more effective at the 4077th.

Oh, thank you. i hope it is on tv real soon

there were 3 Christmas episodes. There was "Dear Dad" from season 1, "Dear sis" from season 8, I think, and "Death takes a holiday" from season 10 (I think).