Unresolved kicks off with Romy still dealing with her partner Nate's death by the Joker, and cutting Marcus out of her life in the process. As Marcus and MacDonald deal with a hostage situation at a local fast food restaurant, the perp is revealed to be an acquaintance of Driver's from his youth, demanding to speak directly to him,revealing a secret of his past, involving the bombing of 96 Gotham Hawks baseball team,leading Marcus to reopen the case, as the two discover the Mad Hatter's involvement.