UNDERCOVER BLUES, starring Kathleen Turner, Dennis Quaid, Fiona Shaw. Directed by Herbert Ross. Category II. On the Panasia circuit. AS WITH The Real McCoy, any film which takes its title from a pun on the name it gives its central character(s) is displaying a distinct lack of original thought from the word go. Was there nothing more the title could be saying about this film, one can't help wondering. The 'Blues', Mr Quaid and Ms Turner, are a nice, married couple living, so to speak, 'undercover' in semi-retirement in picturesque, romantically crime-ridden New Orleans (thus allowing Quaid to reproduce that lady-killing Big Easy drawl ofhis, cher'). The Blues, you see, are top secret service agents, quick of wit and lethal of hand, taking extended '90s New Age leave to bring up baby until getting press-ganged back into action by their old controller. And baby comes too. That, basically, is the joke inthis basic, one-joke comedy. While Herbert Ross was obviously and quite openly aiming for something rather more sophisticated - perhaps a two-fisted, romantic comedy halfway between Romancing the Stone and the 1930s Thin Man series - whatever potential the casting might have allowed in that direction (Turner especially would make a more than adequate Myrna Loy for our times) is wasted. He packs in too many easy-option pratfalls and the kind of silly, over-played panto villains who would not have looked out of place in a Topper Harley pic (Fiona Shaw, in particular, a fine actress, is once again wasted by Hollywood in the role of a man-eating, ex-Soviet bloc spymistress-turned-arms pirate; another of the film's second string characters merely plays the part of a hapless, street-punk Catoto Turner's 'Blue' Panther). The two stars themselves, definitely on Hollywood's A-List for 'alchemy' even if both have fallen to the B-List for 'bankability', could hardly fail to give engaging performances, and it is a pity they weren't given in return the quality of light-comic material they could really have gone to work on. All in all, a very minor disappointment.