The Unreliable narrator

An unreliable narrator is a narrator, whether in literature, film, or theatre, whose credibility has been seriously compromised. Unreliable narrators are usually first-person narrators, but third-person narrators can also be unreliable.

http://en.wikipedia.org/wiki/Unreliable_narrator

Some examples of unreliable narrators:

Nick Carraway: The Great Gatsby - Onlooker on events
Christian : Moulin Rouge

These characters mainly go back in time and narrate the story from their p.o.v and not really from other peoples experience.

This realtes to the character of Billy in my radio play- he is young but dismissive and does not see error that the audience see's such as Helena's life in the camps and the suffering she goes through.