The connection between the two was never established in any installments. The character was written out when Patricia McPherson returned.

Rebecca Holden as April Curtis (Season 2), chief technician for KITT.

The character was dropped after the first season, but due to strong fan reaction and lobbying by Hasselhoff and Mulhare, she was returned for the third season and remained through the end of the series.

Bonnie Barstow (Seasons 1, 3–4), KITT's chief technician and romantic tension for Michael. He was also the spokesman for FLAG whenever it came under scrutiny.

Edward Mulhare as Devon Miles, the leader of FLAG, who appeared in every episode to provide mission details to Knight and KITT.

Elsewhere, requested not to be credited for his role as KITT's voice. Daniels, who simultaneously starred on St.

William Daniels as the voice of KITT, or Knight Industries Two Thousand, the autonomous, artificially intelligent car, with whom Michael Knight is partnered.

Hasselhoff also played Garthe Knight, Wilton Knight's estranged son and a criminal mastermind who drives Goliath, a Peterbilt 352 Pacemaker semi-truck armed with rockets, and protected by KITT's Molecular Bonded Shell. With his new identity, 'Michael Knight', Long is provided with high tech crime-fighting equipment, most notably the car named KITT. Wilton Knight, creator of Knight Industries and founder of FLAG, directs his doctors to save Long's life and reconstruct his face.

David Hasselhoff as Michael Knight (born Michael Arthur Long), an undercover detective of Los Angeles Police Department who, while on a case in Las Vegas, is shot in the face and nearly killed.

Bonnie Barstow is the chief engineer in charge of KITT's care, as well as technical assistant to Devon (April Curtis fills this role in Season 2). Heading FLAG is Devon Miles, who provides Michael with directives and guidance. Michael and KITT are brought in during situations where 'direct action might provide the only feasible solution'. The other half of this pilot program is the Knight Industries Two Thousand (KITT), a heavily modified, technologically advanced Pontiac Firebird Trans Am with numerous features, including an extremely durable shell and frame, controlled by a computer with artificial intelligence.

Wilton selects Michael to be the primary field agent in the pilot program of his public justice organization, the Foundation for Law and Government (FLAG). Self-made billionaire Wilton Knight rescues police Detective Lieutenant Michael Arthur Long after a near fatal shot to the face, giving him a new identity (by plastic surgery) and a new name: Michael Knight.

Knight rider 2000 theme