Question Author
Yes, I'm proud now to have got the characters and the films by myself. I need, however, to check three clues.
14 (A) Old private detectives call for attention (4) : O?ES
( OYES )
31(A) New fracas damaged US motor sport (6): NAS?A?
( NASCAR )
5(D) Too bright in Glasgow to propel boat between river and railway (5) : ROAR? ( ROARY )
As I mentioned before, I'm quite weak at finding extra letters and extra words, but I assume that the final instruction would be to underline the two characters and the three films. Thanks again!