. Bonnie is the mechanic who takes care of KITT. During the second season Bonnie was replaced by April, as the new mechanic. The folowing season she left and Bonnie returned. The next season they acquired a new member, Reginald Cornelius III or RC3.
KITT, the Knight Industries Two-Thousand, was a customized 1982 Pontiac Trans-Am. The 1982 model year was the first year of the third-generation (1982-1992) F-bodies (Cevrolet's Camaro and Pontiac's Firebird share the same platform), and was a complete redesign of the second-generation (see Smokey and the Bandit (1977) for a 2nd-gen Trans-Am). George Barris's company, who had previously done the TV Batmobile, Green Hornet's Black Beauty, Munster's Coach, etc. did the customizing work.
. Glen A. Larson borrowed the idea of the red scanner that sweeps back and forth on the front of K.I.T.T., from one of his earlier projects, 'Battlestar Glactica'. The cylons in that series had an almost identical thing place of their eyes, and Larson adapted the idea for K.I.T.T. Originally, K.I.T.T. had a square red light on the dashboard that lit up as he spoke. His more familiar 'voice modulator', with three red lines broken into cells which went up and down as he spoke, was introduced half-way through the first season.
. Pontiac, who supplied the Trans Am for the series, found itself swamped with customer requests for black Firebird Trans Ams with T-tops, tan interiors, and red lights on the front bumper, just like the show car.
. The "jumping car" was a hollow-fiberglass Trans Am
. The "auto-cruise" car was a right-hand drive car, so that Hasselhoff could get into the car without cutting the scene (only on the last season).
. David Hasselhoff and William Daniels (voice of K.I.T.T.) meet on the Christmas party after six months filming the season. Until that point, Hasselhoff hadn't seen the face behind the voice of the car.
. The "auto-cruise" car was driven by a stunt inside the driver seat.
. Super-Pursuit Mode was introduced as a means of retaining viewers for a fourth season.
. You never see a long shot of KITT changing into Super Pursuit Mode, since KITT is not moving at all. A shell of KITT's body was used when filming the transition to Super Pursuit Mode, since large hydraulic rams were needed to articulate the body panels, and there was no room for an engine or running gear in the car.
. The narrator of the show's opening credits was Richard Basehart who played dying benefactor Wilton Knight in the pilot movie, Knight Rider (1982) (TV).
. Throughout Season 1, there is another car that appears regularly besides the Knight Industries Two Thousand and Devon's Mercedes-Benz convertible. It is a red 1974 (or thereabouts) AMC Gremlin X, possibly one of the crew's personal vehicles. It was never used in a "supporting" role, but only as a vehicular "extra", usually driving away from the camera.
. In the first season episode "Not a Drop to Drink" the scene where KITT fires rockets to cause a mountain to collapse into the path of water from a breached dam, the footage used is the same footage seen in Superman (1978) where an earthquake causes a dam to break and Superman collapses a mountain in to the water's path. The show's producers found it was cheaper to purchase the footage from the Superman film rather then trying to re-create their own scene.