John Ritter collapsed on the set of his current show yesterday before dying at a Burbank hospital, apparently succumbing to a heretofore undiagnosed heart ailment. He was a week from turning 55, which is entirely too young, particularly considering the dramatic work he’s turned in over the last ten years (beginning with Sling Blade). Ritter was the youngest son of western hero and country artist Tex Ritter, which I didn’t know until today.