Continuity mistake: In 3x09, while Kurt and Blaine are singing "Let It Snow", the fire is going. When they finish the song and notice the "audience", it's out. When Kurt is opening his present from Rachel, it's going again.
Continuity mistake: In 3x09, during the opening number, Kurt is wearing the gum wrapper ring he received as a gift from Blaine. Although the scene where he receives it was cut from the aired episode, he wasn't supposed to receive the ring until later in the episode.
Answer: According to IMDb.com, Ian Brennan, one of the "Glee" writers and producers, is listed as the uncredited narrator voice.
Michael Albert