Three boys are told by a mysterious old farmer that if they dig under an oak tree in a field near a church that they would find a "big suprise". What they don't know is that they are in for a "big suprise", indeed. More terrifying than they could have ever imagined.
Big Suprise stars John Carradine as the mysterious old farmer, and one of the boys is played by Vincent Van Patten. Although relatively short, it is one of the best episodes of Night Gallery, written by Richard Matheson, who also wrote a few episodes of the Twilight Zone.