Why Didn’t They Ask Evans? - 1980 - 6/10

Out golfing, Bobby and his doctor partner come across (or strike) a hiker.
His dying words were those above. A puzzle.
Bobby is mildly curious, his female friend, Lady Francis, more so.
Breezy whodunit has multiple suspects that the main players disagree on.
“Well, he’s certainly innocent.” – “He most certainly is not!”
There is a sinister health sanitarium, and a lot of morphine.
Probably too long at 3 hours, but easy to portion. Christie fans ought to seek it out.
Francesca Annis and Tommy Warwick would later pair up as Tommy & Tuppence.