There's a big bad trick on Halloween when an intruder kills a tech inside Knight Industry headquarters. Meanwhile, a storm strands Mike and Sarah on a flight as they race against time to save KITT from self-destruction.

Mike, Billy and KITT go full throttle to bust a money-laundering ring---with Billy finding a bit of romance in the process. Elsewhere, Dr. Graiman tangles with a foe (and flame) from his past.