Dexter is saddled with an unwanted conspirator; Dexter worries about how Rita's death will affect Harrison; Deb works alone; Quinn enlists an old friend's help.
Dexter must save a life; Deb has a confrontation with a key suspect; Quinn follows up on the similarities between Dexter and Kyle Butler.
A prison inmate relates a conversation he overheard to Lilly, leading her to believe the wrong man is serving time for the murder of a 16-year-old girl.
When a crewmember is endowed with super human intelligence by an alien probe, he threatens the fate of the Enterprise.
Scully fears that she and another pregnant women will give birth to alien babies.