Saving Grace, starring British actress Brenda Blethyn (Secrets & Lies), is a crowd-pleasing comedy in the tradition of The Full Monty and Waking Ned Devine. Blethyn plays Grace Trevethan, a recent widow whose cheating husband left her broke. So her gardener, Matthew (Craig Ferguson), persuades Grace to grow grass — the kind you can smoke — in her greenhouse, and pot becomes her salvation. Look, it’s not Cheech and Chong. You know where this movie is going every step of the way. But Blethyn’s solid-gold charm turns Saving Grace into a comic high.