Jason tells Stewart that Michele reminds him of his wife Marion, a movie actress who died in a airplane crash.
Amongst Jason's novels stocked by the bookshop: "Istanbul Iliad", "Enough is Enough is Enough", "The Lady is Willing", "Identity, Mark Caine!", "From China Yours Sincerely" and "Index Finger Left Hand". It's implied he's written "The Man Who Fell to Earth" too.
When Jason King is hiding on a ledge of the hotel and briefly looks down, he sees a cinema with 6 James Bond logos in bright neon. The cinema is showing On Her Majesty's Secret Service, the 1969 Bond film starring George Lazenby in his only outing as 007.