Prince Osric

In the short story The Girl in the Train, Prince Osric is the father of Prince Karl, and the uncle of the Grand Duchess Anastasia of Catonia. He objected to the marriage between the Grand Duchess and Lord Roland Gaigh as he wanted her to marry Prince Karl instead. Osric spotted Anastasia on her way to the registry for the wedding and started to follow her. However he was taken in by a ruse devised by Anastasia's sister-in-law-to-be Elizabeth Gaigh. She had switched coats and hats with Anastasia and had told the taxi to drop her off at Waterloo Station. Osric followed Elizabeth to the station thinking she was Anastasia. He thought he saw her get into a train compartment occupied by one George Rowland and tried to force his way in, demanding to know where his niece is. George, however, had seized the initiative and had complained to a porter. The porter and a guard removed Osric from the train. Afterwards he likely told Prince Karl about his encounter with George, since Karl later tracked down George.

Portrayals
In the episode The Girl in the Train of The Agatha Christie Hour, a TV film adaptation of the story, the part of Prince Osric is played by David Neal.