'Goliath' by Robert Foster and Robert W. Gilmer

The late Wilton Knight's ex-wife, Elizabeth, and his villainous son, Garthe – a bearded double of Michael – return to the USA from Africa and steal the special formula for K.I.T.T.'s molecular bonded shell. Having applied the compound to an eighteen-wheeled juggernaut dubbed ‘Goliath’, Garthe and Elizabeth join forces with a gang of mercenaries in order to steal a consignment of nuclear missiles from a secret government facility. Michael and K.I.T.T. set off to stop them – but are they good enough to best their evil counterparts..?

David Hasselhoff (Michael Knight / Garthe Knight), William Daniels (K.I.T.T. [Voice]), Edward Mulhare (Devon Miles), Rebecca Holden (April Curtis), Barbara Rush (Elizabeth Knight), Shawn Southwick (Rita), Zakes Mokae (Tsombe Kuna), Ivan Naranjo (Chief Car Salesman'), Paul Lambert (General Maddox), Pepper Davis (Gambler), Petrus Antonius (Hotel Clerk), Murray Westgate (Technician)

Directed by Winrich Kolbe
Produced by Robert Ewing

TX (US): 2nd October 1983

Notes:
*Featuring Michael Knight, Devon Miles and K.I.T.T., and introducing April Curtis

*This is a double-length episode