This was David Soul's debut as a director.
Cheaper by the dozen: the famous turtlenecks that David Soul sports as Hutch were 100% cotton, 2x2 rib and bought from Woolworth's, in many colors. His well-worn lavender one was his favorite to wear in the series and the pink one, his most striking; the bad guy that fights Hutch early on is here wearing the same one in beige, and Starsky later sports one in navy blue. Many more were purchased (black, burgundy, forest green etc.) and worn in the series. Watch for the baby blue one.
This episode is a recycled script from "Adam-12" (Season 4 episode 5, "The Search").
Hutch departs from his traditional lavender turtleneck---seen in many episodes---and uncharacteristically here rocks a pale pink one.
Product Placement: when Hutch is cooking, a close-up on his hands shows a metal canister of Piedmont black pepper. This must have been an era product which has since been discontinued.