Splash think water. Who was told to turn again and who was a terror on highways in times past. All share first name.
Mutiny - think film, Humphrey Bogart. Who worked on a railway in American Civil War and shared his first name with the Roman poet?
More clues for splash one. A main character in famous 1851 novel and 1956 film. Next lived 1705-1739 played by Richard O'Sullivan on TV. Other lived 1354-1423 famous for his cat.