Board Thread:The Reference Desk/@comment-5545417-20131116122722/@comment-88790-20131201134317

Zagreus features the actors who played the Doctor (and companions) in situations generated by the Matrix / the TARDIS playing different roles from what they originally played portraying occurrences from the real universe in a meta-reality to help the Doctor understand the altered universe and Rassilon's role with the Divergents. Simple and something not to worry about too much.