Liam Neeson has a name that’s difficult to pronounce and remember, but he always gets picked to play those hardcore, serious mentor roles. Like Qui-Gon Jinn (the mentor of Obi-Wan Kenobi and the grandmentor of Darth Vader), for instance. Or all those Taken movies (bad guys really need to stop kidnapping Liam Neeson’s kids). But have you ever stopped to wonder why we don’t cast someone…