Morse vs Lewis

This is another one of my rants, not so much a humerus nurse at the moment.
I've just watched an episode of lewis which as far as I know was meant to be the follow on from Morse and the natural progression of Lewis to raise to inspector as it was implied on the very last episode of Morse which I thought was a great idea as this would maintain continuity, but no this apparently hasn't happened as i've just watched an episode of Lewis where one of the characters who died after a struggle with Morse in a car by accidentally impaling himself on a large carving knife was just helping Lewis with his enquires.
I didn't realize that britain had such a shortage of actors unbelievable...rant over.