“Panama” (** out of four) was a muddled paranoia thriller about an ex-marine (Cole Hauser) who is hired by a defense contractor (Mel Gibson) to travel to Panama to complete an arms deal but subsequently becomes involved with the U.S. invasion of Panama and the various crossfires involving political power. Never detonates or ignites as it should, despite interesting locales and subject matter. Even the first-rate Hauser seems to be just going through the motions. A disappointing result from director Mark Neveldine who co-directed the cult classic “Crank.”