<Tr> <Th> 66 </Th> <Td> 17 </Td> <Td> "Burning Down the House" </Td> <Td> Dean Bennett </Td> <Td> Leila Basen and David Preston </Td> <Td> March 13, 2011 (2011 - 03 - 13) </Td> <Td> 417 </Td> </Tr> <Tr> <Td_colspan="7"> Tim and his girlfriend announce that they are selling the ranch and moving to California . But one of Tim's old girlfriends comes back and claims that Tim is the father of her son, Shane, and a paternity test says that he is . Ashley finally comes home . Ty is still having trouble just being friends with Amy . Ashley decides to go to school in British Columbia and Caleb is not sure if to go or to stay . </Td> </Tr> <Tr> <Th> 67 </Th> <Td> 18 </Td> <Td> "Passages" </Td> <Td> Dean Bennett </Td> <Td> Heather Conkie </Td> <Td> March 27, 2011 (2011 - 03 - 27) </Td> <Td> 418 </Td> </Tr> <Tr> <Td_colspan="7"> Amy and Ty work through their trust issues as they train a pair of Clydesdales . Tim is still reeling from the knowledge that Shane is in fact his son but he finds himself bonding with the boy despite himself . Bad feelings resurface between Caleb and Val when he accuses her of manipulating Ashley and her decision to go away to the university . Meanwhile, Lou's due date is still three weeks away . Lou goes into labor at home, and Ty and Amy deliver a girl . </Td> </Tr>

When does lou have her baby in heartland
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