Instruct: Classify a given review as either positive or negative.
Query: New 30-minute radio mysteries --but almost charmless

This is a Canadian revival of the old 30-minute radio mystery show format: A protagonist cab-driver we come to know, the owner of the cab company, the dispatcher, and then their odd encounters with cab customers. But it's almost charmless (except for the Canadian accents, which are pleasant). The characters have idiosyncracies, but they're not interesting. The plots are either downright dumb (as in title story) or so quickly sketched that it's sort of just starting by the time it's solved. It's nonviolent, inoffensive, and it passes the time, but just that.