The chase through the drive-in theater took place at the Pickwick Drive-In in Burbank which was torn down about ten years later and replaced with a Von's Pavilions and a shopping center.
In this episode, we learn Rockford's a fan of music by Ella Fitzgerald, and Count Basie. He has them recorded on reel-to-reel tapes.
The marquee on the Pickwick drive-in theater (since torn down) which Jim (James Garner) and Angel (Stuart Margolin) drive into, has Once Is Not Enough (1975), and The Gambler (1974), listed as currently playing. Stuart Margolin had a supporting role in the latter film.
The fact that Sturtevant picks Rockford's name out of the phone book at random is yet another allusion to Raymond Chandler's novel Farewell My Lovely (1940), in which Lindsay Marriott picks Philip Marlowe's name in exactly the same way, involving him in no end of problems.
One of the crimes revealed on Sturtevant's tapes involved Vito Genosa's tailor doing some killings for him. Genosa was the underworld figure about to put Rockford to death on this season's premiere "Aaron Ironwood's School of Success" (1975).