The Practice has beamed up William Shatner for a four-episode guest stint. The Star Trek icon will play an "eccentric, well-connected, power-drunk legal legend who is chief partner of a law firm that goes head-to-head" with James Spader and Co. He'll first air in late April. Meanwhile, it looks like fired Practice star Dylan McDermott is headed back to the ABC drama later this season after all. For more on that, pick up the new issue of TV Guide magazine — on sale today!