An English teacher travels back in time to prevent the Kennedy assassination, but discovers he is attached to the life he has made in a bygone era.

In order to make good with his former employers, a submarine captain takes a job with a shadowy backer to search the depths of the Black Sea for a submarine rumored to be loaded with gold.

In Roman-ruled Britain, a young Roman soldier endeavors to honor his father's memory by finding his lost legion's golden emblem.