Couples Retreat, Peter Billingsley, 107 mins, (15)

Starring Vince Vaughn, Jason Bateman and Kristin Davis

Oh my, the smell coming off this thing.

Vince Vaughn and Jon Favreau are both the writers and stars of this ensemble comedy about four couples who go on holiday to a Caribbean island resort: their dreams are of fun, sex and jetskiing, but instead they're dragooned into daily therapeutic workshops that only reveal how dissatisfied they are with one another. If it were a send-up of couples therapy and its absurd language the film would at least be about something, but it hasn't even that much intelligence. In one scene, Vaughn and Favreau do a little back-and-forth improv, and it's not just bad, it's sad – because you remember how terrific they were together years ago in Swingers. Since when they've gained a fair bit of weight and lost whatever comic mojo they once had.