Charlie says the title A Lungful of Alan in this episode.
Jamie: You can never have this. NEVER, NEVER, NEVER!
The German episode title is "Eine Nase voll Alan", meaning "A Sniff of Alan". The French title is "Une brise printanière", meaning "A Spring Breeze". The Italian title is "Mai, mai e poi mai", meaning "Never, Never, Never". The Spanish title is "Mucho Alan", meaning "Lots of Alan".
This episode's end titles has Chuck Lorre's Vanity Card #127.
Marin Hinkle (Judith), Melanie Lynskey (Rose), Holland Taylor (Evelyn), and Conchata Ferrell (Berta) didn't appear in the original airing of this episode.
Jon Cryer and Paget Brewster starred together on the short lived sitcom, The Trouble with Normal.
Charlie keeps referring to Alan's old classmate, Jane Eckelberry as "Eckelberry Hound", a play on the cartoon character, Huckleberry Hound.
Charlie exclaims, "To the Batcave, Alfred," in reference to the headquarters of Bruce Wayne's alter ego, Batman, and his butler.
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