How do you choose just one of your children as favourite from the others?
There has been many good choices listed.
A local western themed restaurant (Montana's) used to play movies. We saw "Rio Bravo" so often, it probably is our favourite. Who didn't love a young Angie Dickenson? She was hot!
While racking my brain for a choice not already selected, I remember watching a John Wayne cop drama in London. It was filmed in London and was called "Brannigan". Pretty good.
