Reversing their earlier decision to cancel the two remaining episodes of the season, the producers of NBC's "Suddenly Susan" have now decided to put together a special episode of the sitcom that will pay tribute to the late cast member David Strickland. The actor, who played Todd the music critic, hanged himself in a Las Vegas motel room last week. The episode will be taped the week of April 12, with a broadcast date yet to be determined. Details are being worked out, but the episode probably will feature "Susan" scenes highlighting Strickland's performance.