Variety is reporting that ABC is indeed picking up David E. Kelley's Boston Legal for a fifth season. Apparently it was all tied-up in a deal with another show Life on Mars, which ABC wants to greenlight, but Kelley owns the rights to the show. It appears Boston Legal came into the negotiations, and as a result BL fans are getting another season of Denny Crane.
What exactly the deal will be with Life on Mars remains unclear, but if the Variety story is correct it appears Kelley will be leaving that show and October Road executive producers Josh Appelbaum, Andre Nemec and Scott Rosenberg are in line to take over as show runners. Expect all the details to pour in througout the week.