In this ” exclusive (video) interview” for The Telegraph (I think), the actors and director of The Eagle film (based upon the great The Eagle of the Ninth historical novel by Rosemary Sutcliff) talk on the set in Scotland in 2009 about the relationship between Marcus (Channing Tatum) and his slave Esca (Jamie Bell).
Source: The Eagle | Behind the scenes with Channing Tatum and Jamie Bell | Telegraph.