Andrew Gallagher

Andrew "Andy" Gallagher was one of the Special Children who had the psychic power of Mind Control and through training and meditation developed the ability of Mental Projection.
Andy first appeared in the Season Two episode Simon Said as the suspect in a series of bizarre deaths orchestrated by phone, which happened to be the work of his evil twin brother and then later aided Sam and Dean in stopping his brother.
He came to be abducted later on the same night as Sam, Jake Talley and Lily Baker by the yellow eyed demon Azazel who bestowed him with his unique abilities.

He is portrayed by Gabriel Tigerman in the series.