<Tr> <Td_colspan="2"> Shemar Moore as Derek Morgan </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> "Extreme Aggressor" 1x01, September 22, 2005 </Td> </Tr> <Tr> <Th> Last appearance </Th> <Td> "A Beautiful Disaster" March 23, 2016 (as Main Cast) "Red Light" 12x22 May 10, 2017 (as Special Guest) </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Jeff Davis </Td> </Tr>

What episode does derek morgan leave the bau