I remember loving the 60s Disney adaptation when I was a kid, but that might just be my nostalgia speaking! XD I also really liked the one with Michael Caine as Alan. I can't remember if you've read "Catriona", but I think this movie spoils some parts of it? Again, I don't know if it holds up, but as a kid, I thought it was great fun!

Every time I think of "Kidnapped", I think about how it was one of my earliest m/m ships, except that 10 year old me didn't know it was called shipping! XD