Wayans has comic chops, but 'Marlon' tries too hard for laughs

“Marlon" is an amiably silly summer burn-off meant to showcase the talents of Marlon Wayans -- a funny, clever guy who seems constrained by the trappings of the sitcom format. As a result, the comedy doesn't take off as it might have were it not trying too hard to be a family comedy. Wayans, a...