<Tr> <Th> 40 </Th> <Td> 16 </Td> <Td> "Joey and the Party for Alex" </Td> <Td> Gil Cates Jr . </Td> <Td> Vanessa McCarthy </Td> <Td> May 9, 2006 (2006 - 05 - 09) </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="7"> Joey's feelings for Alex grow stronger . Dean throws a party for Alex's 30th birthday and plans to propose . Meanwhile, Gina and Jimmy decide to get tattoos together . </Td> </Tr> <Tr> <Th> 41 </Th> <Td> 17 </Td> <Td> "Joey and the Big Move" </Td> <Td> Gary Halvorson </Td> <Td> Jean Yu </Td> <Td> May 16, 2006 (2006 - 05 - 16) </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="7"> Joey finally moves into his house, but a fire destroys it . Jimmy learns that he is Michael's father, and he and Joey try to get Michael's DNA without him knowing so they can conduct a paternity test . Meanwhile, Michael gets new roommates . </Td> </Tr>

When does joey know about monica and chandler