Sarah learns of Riley's death and everyone assumes that Cameron did it.  John at least gives her a little benefit of the doubt by looking into things further.  Jesse's story is told in 2027 when she boards her sub on a new mission.  Midway through the mission the crew learns that the plans have changed and that the only one who knows them is the sub captain, a cyborg.  Meanwhile John Henry lures the saddened Savannah away and gets her to play hide and seek.  Weaver and Ellison have to play a question game in order to find her.  While Weaver is amused, Ellison is not.