Eric Mabius, Kristin Booth, Crystal Lowe and Geoff Gustafson explore the mystery of true love when they return for a new duty to deliver in “Signed, Sealed, Delivered: From Paris With Love.” The Postables,Oliver (Mabius), Shane (Booth), Rita (Lowe) and Norman (Gustafson),explore the mystery of true love as they deliver divorce papers to one couple the same day Oliver’s missing wife reappears.