Director Joseph H. Lewis was famous for setting up the camera in bizarre places and fashions (avoiding actors' faces quite often) and intentionally held scenes for awkward amounts of time to build tension. When the Columbia producer visited the set, he thought Lewis was crazy. They fought over schedules and budgets, as well as Lewis' artistic license to set up his scenes as he liked, and Lewis threw the Columbia producer off the set. Lewis was well on his way to becoming a pariah at Columbia until co-founder and president Harry Cohn screened the film. He supposedly shouted at his producer, "Send him a barrel of whiskey, because any man with this talent can take the time he wants to. Now don't bother him."
In a 1988 interview about this movie, Nina Foch said that the idea that Dame May Whitty had George Macready as a son was "hysterically funny in a bizarre sort of way".
Carrington Street, W1, is an address in London's posh Mayfair; not Bloomsbury, which is a book and publishing neighborhood and home of the old British Museum.