Vinnie discovers Doogie's journal has been keeping a journal and wonders if Doogie's blackest day really was when his parakeet died.
Personal journal of Doogie Howser, M.D.: DECEMBER 15, 1991... This week Vinnie introduced me to three really brilliant healers, Moe, Larry and Curly They taught me that medicine may heal the body, but laughter heals the soul.<
Though credited, Lucy Boryer does not appear in this episode.
The German episode title is "Nichts geht über Lachen", meaning "There's Nothing Like Laughter".
Episode title: "It's a Wonderful Laugh"
Referencing the title of Frank Capra's 1946 motion picture, It's a Wonderful Life, now a Christmas season staple.