The musical number was shot in one day, but Karen Fukuhara (Kimiko) and Tomer Capone (Frenchie) rehearsed six times, with an additional two rehearsals with the dancers. In the musical number, Tomer is seen wearing non-slip dance shoes, not Frenchie's usual boots.
The film that Kimiko and Frenchie are watching in hospital is the American musical film Girl Crazy (1943).
Hughie makes a reference to Trainspotting (1996), a movie about Scottish junkies. In the comics, Hughie is actually Scottish.
The Legend is based on Stan Lee in the comics, but portrayed on this TV series as analogous to Robert Evans.
The Russian calendar says, "Come and get better," as the camera pans down to Frenchie hoping Kimiko gets better.