Picture postcard that The Good Doctor finds on Frank's person and reads from shows the Baha'i Temple, located in Wilmette, Illinois.
Shown on a double bill with Madigan's Millions (1968) in its original U.S. release. The latter film had Dustin Hoffman in a leading role; this film similarly featured Jon Voight. Both were cheap independent movies made when the actors were near-unknowns and both had been on the shelf for a while. However, Hoffman and Voight had had a great success together in "Midnight Cowboy" (1969), and the two indie-movies were snapped up by distributors and double-billed to cash in on this.
Filmed in 1967.