The new series Knight Rider has been canceled after a scant four episode run. I never saw it, but the Discover magazine blog reports that KITT, the Knight Rider supercar, had an on board 3D printer (To be precise it actually looks like a selective laser sintering machine). Why you ask?
In a throwaway scene in the middle of this episode, Knight and Sarah Graiman (as the resident Babe Mechanic/Scientist that NBC feels we all should have in our lives) are sitting in KITT, pondering how best to steal a car from one of the bad guys. Stealing the car would be much easier if they had the key to the car, so KITT obliges them by by figuring out what key would be needed to open the car and making a software image of it. Then Graiman orders KITT to bust out his 3-D Duplicator. A little box located somewhere in the space that would be occupied by a backseat in a normal car springs to life, a laser starts cutting some kind of material, and voila, Knight gets the key he needs. He even looks suitably impressed at the technology.
Michael Knight had just better hope the person he is tracking stays away for a solid 5-6 hours while the machine produces the part. If you are interested the series is available on Hulu.

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