Amazon Studios have cast Titans star Alan Ritchson in the lead role of its upcoming Jack Reacher TV series.The new series is based on the character from Lee Child’s international bestselling series of books, which spawned two film adaptations starring Tom Cruise, 2012’s Jack Reacher and 2016’s Jack Reacher: Never Go Back.News of the new series was announced back in January, when Jennifer Salke, Head of Amazon Studios, revealed that the first season will be based on the 1997 book The Killing