The only ever dramatic theatrical feature film to be scored by Jazz pianist and composer Oscar Peterson who, coincidentally, was a schoolmate of lead actor Christopher Plummer.
Star Elliott Gould held a private screening for legendary suspense-thriller director Alfred Hitchcock who apparently loved it.
Director Daryl Duke walked off the film due to creative differences. Curtis Hanson, who had originally intended to direct the film, took over the remainder of the shoot as well as the pick-up shots, and handled all the post-production on the film.
Thriller writer Curtis Hanson's first successful suspense movie. Hanson would go on to write and/or direct such thrillers as L.A. Confidential (1997), Das Schlafzimmerfenster (1987) and Die Hand an der Wiege (1992).
One of the first Canadian films to be developed and financed by the Canadian government's "Capital Cost Allowance" program, controversial for being a tax shelter scheme.