The Collaborative International Dictionary of English v.0.48:

docudrama \docudrama\ n.
   a film or TV program presenting the facts about a person or
   event.

   Syn: documentary, documentary film, infotainment.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

docudrama
    n 1: a film or TV program presenting the facts about a person or
         event [syn: documentary, docudrama, documentary film,
         infotainment]