<Tr> <Td_colspan="7"> Dexter Morgan (Michael C. Hall) is introduced as a serial killer who kills other killers who have escaped from, or haven't been found by the justice system . By day he is a blood spatter analyst who works for the Homicide Department of the Miami Metro Police . Dexter has a quasi-relationship with Rita Bennett (Julie Benz), a similarly troubled divorcee raising two young children while her former husband is in prison . One day, Dexter is called to a murder scene involving mutilated bodies, but with no blood visible . The murderer, soon to be nicknamed the "Ice Truck Killer", intrigues Dexter with this intricate methodology and a personal message in the form of a mutilated doll . At the same time, Dexter's hard - nosed sister Debra (Jennifer Carpenter), a vice squad officer, tries to gain a transfer into the Homicide Department . </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Crocodile" </Td> <Td> Michael Cuesta </Td> <Td> Clyde Phillips </Td> <Td> October 8, 2006 (2006 - 10 - 08) </Td> <Td> 0.72 </Td> </Tr> <Tr> <Td_colspan="7"> Dexter assists detectives Batista (David Zayas) and Doakes (Erik King) in investigating the murder of an officer, who was working undercover investigating drug baron Carlos Guerrero (Rudolf Martin). Doakes is personally involved in the case, since he was having an affair with the officer's wife, who was also attacked . Meanwhile, Debra discovers the refrigerated truck in which the Ice Truck Killer dismembers his victims, and is promoted by her superior, Lieutenant María LaGuerta (Lauren Vélez), to the Homicide Department . Inside the truck, Debra, Batista, and Dexter find a block of ice with five fingertips in it, left deliberately by the Ice Truck Killer . </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Popping Cherry" </Td> <Td> Michael Cuesta </Td> <Td> Daniel Cerone </Td> <Td> October 15, 2006 (2006 - 10 - 15) </Td> <Td> N / A </Td> </Tr>

Who played the psychiatrist in dexter season 1