But the saccharine, sappy songs (thanks so much, Celine Dion, Steve Perry, and Carole Bayer Sager) make Quest for Camelot nearly unwatchable (with the sound on, at any rate). Pity, since the musical score by Patrick Doyle (Henry V, Much Ado About Nothing) is first rate. Idle and Don Rickles star as the requisite odd couple, a two-headed dragon named Devon and Cornwall -- they're no Timon and Pumbaa, but they do have the one good musical number in the entire film. Bring the kids, buy up the toys from the fast-food chain, but don't expect to be entertained . . . much.