After five decades, poor Linus Van Pelt is still waiting in that pumpkin patch. Good grief, indeed! It’s the Great Pumpkin, Charlie Brown, Charles Schulz’s Peanuts special that turned a gourd into an icon, is honoring its 50th year with an anniversary airing (Wednesday, October 19, 8/7c, ABC), and executive producer Lee Mendelson thinks the milestone is worthy of the celebration. “It’s certainly as popular as [A Charlie Brown Christmas], and I think Mr. Schulz liked it just as much,” he says. “In some respects, it’s got strengths that the Christmas special doesn’t. It has the vibrant fall colors, it’s the first time Snoopy flew his doghouse. It was the first time for a lot of things in cartooning.”
Debuting October 27, 1966, on CBS, the tale of tricks or…