I watch very few TC films. I have watched Mission Impossible, because I have fond memories of the original series. I probably saw Top Gun and Rain Man on french tv many many years ago and I don't think that I have seen one other film with him in.
And then they get it right. I read The Echo by Minette Walters and then some time later saw that it was going to be on tv. For the life of me, I couldn't work out who they would get to play the journalist who was supposed to be fairly young, but down at heel and handsome. Ofcourse they did find someone, Clive Owen, who played it beautifully. Excellent casting. So sometimes they do get it right.
There are some of the detective series on tv that I have never watched, I know what Adam Dagleish looks like and it is certainly not like any of the actors who have played him. Or George Baker playing Wexford? not my Wexford. Very off putting. And that is the glory of plays on Radio 4 they get most of the actors to look 'just right' for me.