When the first draft of Danny Rubin’s script landed on Ramis’s desk in 1991, the basic concept and structure were already in place, but it was Ramis that located the sweetness in the story, while simultaneously drawing out its citric bite. His first instinct was to have Tom Hanks take the role of Phil Connors, the TV weatherman who finds himself trapped in a time-loop, but once he had rewritten the script, he realised Bill Murray was the only sensible option.