For a movie whose whole plot revolves around age difference, it is interesting to note that the actor who plays Tom Bell's dad was less barely 9 years Tom's senior.
The sculpture that Len (Tom Bell) and Val (Olivia Hussey) pass in the park is Henry Moore's "Three Standing Figures" (1948). The figures gaze blankly across the lake as if unsure of their future. This may be a metaphor for the situation in which the three main characters find themselves.
The copyright date is 1969.
This movie mentions on-screen that the cast credits are in order of appearance.
Opening credits: All characters portrayed in this story are fictitious and bear no resemblance to anyone either living or dead.