It's the Great Pumpkin, Charlie Brown

Flying ace Snoopy has been shot down by his enemy, the Red Baron, and is escaping across no-man's-land back to the aerodrome. Charlie Brown, Lucy, and the gang are ringing doorbells on a trick-or-treat round. Meanwhile back in the pumpkin patch, Linus and Sally are being sincere with all their might. . . . IT'S THE NIGHT OF OCTOBER 31ST, AND THE HOUR OF THE GREAT PUMPKIN IS NIGH!