Ok, while we are on the topic of helping people remember movie titles, I got two for ya!.
The first I believe is from the 50's, but maybe 40's or 60's. I thought it stared Cary Grant, but looked at his IMDB, and nothing seemed to ring a bell. In the movie a guy is murdered (on a train I think), and a band of thieves are trying to kill his widow. They believed the victom had some money they stole in the war (wwII?). The widow meets a stranger he appears to be protecting her, but he also appears to be involved with the thieves. She finally finds out that the money was used to buy a rare stamp and she decided to turn it over to the US treasury(?). Turns out the person she turns it over to is the stranger.
The 2nd movie, I saw in Spain and I don't speak spainish so can't remember if it was subtitled or I just had to guess what they were saying. It was 1982 or 1983, and I think the movie was called Tiburon 3, which would be shark 3. I honestly thought I was watching Jaws 3 in spanish. But a few years later when I returned to US and saw Jaws 3 in english, I realized it was not the same movie. It did have some similarities to Jaws 3, the manner of the sharks death was about the same. There was a severed arm holding onto a grenade in sharks mouth that was pulled with a stick. There was even one scene were they were in someones house and there was a framed picture of Brody standing next to the tiger shark on the pier from Jaws 1. This really sold me on the idea it was a jaws sequel. The climatic scene had the shark chowing down on people during a wind surfing competition.
TIA Mike