[1] Catherine Morelli goes to the latest wedding of her father, Max, who in turn wants to introduce her there to a potential suitor, Gregory Mulvey, an American friend of both himself and her brother.

Michael Sarrazin, who was under contract to Universal, had to drop out of the role of Joe Buck in Midnight Cowboy (1969) that brought Jon Voight an Best Actor Oscar nomination due to a commitment to appear in this production.

(Ironically, Midnight Cowboy was directed by Schlesinger, the filmmaker who discovered Christie and steered her towards stardom, who wound up winning the Academy Award for Best Director.)

Despite In Search of Gregory being a box office flop and forgotten while Midnight Cowboy went on to become a smash hit and a classic, Sarrazin expressed no regrets for the turn his career took.

"In Search of Gregory fails not so much from the stupidity of its plot as from the dim timidity of its inventions.... [E]very crucial incident dulls and strains, and does not excite, the imagination.