The premise of Knight Rider was that young police officer Michael Long (David Hasselhoff) was shot in the face and left for dead. He was rescued by millionaire Wilton Knight who left his estate to Michael on the condition that he used the resources to fight crime.
Out of respect for the dead millionaire he took his saviour's surname and became the Michael Knight that we know and love.
Michael also inherited an amazing computerised black car that could
talk, had mood swings and could drive itself - much to the consternation
of potential thieves. He (it had a masculine voice) was called Knight
Industries Two Thousand, or KITT for short.
With the help of Wilton's friend Devon Miles, F.L.A.G. and a lorry-cum-garage they always succeeded in their fight against crime.