<Table> <Tr> <Th_colspan="2"> "Gaslit" </Th> </Tr> <Tr> <Td_colspan="2"> Gossip Girl episode </Td> </Tr> <Tr> <Td_colspan="2"> Jenny tells Blair the truth behind Serena's overdose </Td> </Tr> <Tr> <Th> Episode no . </Th> <Td> Season 4 Episode 10 </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> Tate Donovan </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Robert Hull & Joshua Safran </Td> </Tr> <Tr> <Th> Production code </Th> <Td> 410 </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> November 29, 2010 (The CW) </Td> </Tr> <Tr> <Th_colspan="2"> Recurring / Guest appearances </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Zuzanna Szadkowki as Dorota Kishlovsky </Li> <Li> Connor Paolo as Eric van der Woodsen </Li> <Li> Katie Cassidy as Juliet Sharp </Li> <Li> Sam Robards as Howard Archibald </Li> <Li> Francie Swift as Anne Archibald </Li> <Li> David Call as Ben Donovan </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Episode chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← Previous "The Witches of Bushwick" </Td> <Td> Next → "The Townie" </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> List of Gossip Girl episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "Gaslit" </Th> </Tr>

When do they find out serena didn't overdose