Everyone Knows What Vehicle is the black car as seen on this clip from the unknown series/movie (the title from the video is not the name it's probably the actress name or her character), i know the police car is a Chevrolet Caprice since nearly all the police cars are these, it looks like Porsche 911 but it's too low quality to identified especially the logo on the steering wheels

https://www.youtube.com/watch?v=TYByx6FZ8bM

Jaguar XJ-S

Agree, Jaguar XJ-S [XJ27].

Probably an early one - there's no bonnet badge or logo in grille, although mirrors may not be earliest style.