David E. Kelley's spin-off from 'The Practice,' set at a high-priced Boston law firm, plays smartly on the chemistry between James Spader (as wry and wily lawyer Alan Shore) and William Shatner (as flamboyant, eccentric partner Denny Crane). Both won Emmys when they introduced the roles on 'The Practice.' Apart from benefiting from a 'Desperate Housewives' lead-in, 'Boston Legal' got a ratings boost when Candice Bergen came aboard as no-nonsense partner (and Crane's ex-lover) Shirley Schmidt.