Returns: Tuesday, April 8, at 10 pm/ET (ABC) Number of new episodes: 6 Where we left off: Denny and Alan limped through Coast Guard training, while Carl transferred from the Manhattan office. What's next: In the first episode, Alan teams with Jerry Espenson (Christian Clemenson) on the case of a murder incited by tabloid TV. Later, Shirley defends a vet arrested for killing seals for food. Bombs away: Sack will lose some dignity when he represents the island of Nantucket, which tries to buy plutonium to build its own nuclear device. Watch video clips | Photos | More Returning Favorites coverage