The episode of "Boston Legal" that aired in early April 2007 involved a man taking most of the cast hostage to have a re-trial. The original trial involved an early defense by Denny Crane (Shatner), in which he used a "trick" to get an accused murderer acquitted. The victim of the murder was the hostage takers mother. The retrial involved reading the original transcripts, during which flashback scenes (in black & white) were shown, mostly of Shatner's very youthful character talking to his overbearing lawyer father. Cleverly done, and it must have been this episode, although I've never seen the episode other than as part of "Boston Legal".
Review of The Defender: Part 1
