50's movies

I like the old black and white films that use to show in our cinemas. A recurring theme for 50's time travel movies is the search for truth, to unravel the mysteries of our past. 

• Who invented fire? 
• Where is the city of Eldorado?
• What really happened to the Russian royal family of Romanov?

OK some 50's movies also depict time travel as a tourist attraction, to be able to witness historic events or meet infamous people of the past. Another angle shown by our cinema is that the time traveller himself causes these major events in our past, that if he did not go to the past it would not have happened. An example would be a man travelled to the past to witness how the Titanic sank only to later find out that it was the time traveller who was the reason for the sinking,

Another mind boggling example how time travel can affect someone’s past in the form of The Grandfather Paradox is a man going back and falling in love with a woman there, gets her pregnant and upon returning to the future finds out that she was his grandmother and that he is his own grandfather. The romance movie Somewhere in Time also showcased another paradox – this time it focused on an object, a pocket watch. In the movie, the pocket watch was given to a man by an old lady. The man travels to the past meets the old lady when she was younger and leaves the pocket watch with her, which she will give to him in the future. This shows that the watch was never built but exists eternally.