The Title of the episode 6.09 will be “Clap Your Hands If You Believe”
Source: Andreas at LJ.
Additionally we are told that it will feature a UFO hunter.
FAIRIES! – While Sam (Jared Padalecki) and Dean (Jensen Ackles) are investigating a UFO sighting, Dean is abducted from a crop circle. However, when he awakens, he discovers he isn’t dealing with aliens, but fairies! Unfortunately, only Dean can see the fairy that keeps attacking him which makes tracing and stopping them difficult. The brothers become even more perplexed when Sam’s investigation leads them to a world full of elves, gnomes and a leprechaun.
John Showalter directed the episode written by Ben Edlund.