The first line of dialogue only occurs eight minutes into the movie, the second six minutes later, when the heist is over. Apart from that one line, the entire heist is done without any dialogue, which is reminiscent of the wordless robbery scene in Rififi (1955).

This was the third film starring Sidney Poitier as Virgil Tibbs, following In the Heat of the Night (1967) and They Call Me Mister Tibbs! (1970). With this entry, the Virgil Tibbs franchise became one of the first, if not the first, cop movie series made in color to make it to part three (the Dirty Harry (1971) movies did not start until the same year that this film came out).

In 1971, United Artists distributed this film on a double bill with Lawman (1971) starring Burt Lancaster and Robert Ryan.

Max Gail's film debut.

Final theatrical film directed by Don Medford, released a few months after The Hunting Party (1971).

The tunnel scene is filmed in the BART tunnel which can be seen still under construction. It would begin service the following year, Sept. 1972.