This should be terrible. But we love it. We love Matthew Lillard as Shaggy, we love the knowing riffs on the original series, a classically just-post-nineties cast (Sarah-Michelle Gellar! Freddie Prinze Jr!) and we love the out-of-nowhere-but-really-funny appearance of an old, old enemy. It’s great dumb fun for kids and adults. Liiiike wooooah, Scoob! Trailer here Sunday, 4.20pm Channel 5.