When was this filmed?
Not when it was released. It says 1977 and released 1978, but Richard Thomas was still on The Waltons, I believe. I've read that Richard Thomas was hurt filming a movie the summer of 1976 and I'm wondering what movie it was he was in? I don't see anything listed for 1976. He went back to being JohnBoy Sept 1976 and was using a cane during two or three episodes of season 5.
Ok, this was the movie. Just found the answer to this. Trivia:Richard Thomas broke his leg when he drove his character's motorcycle under a parade float while filming a homecoming parade scene.