<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2011) (Learn how and when to remove this template message) </Td> </Tr> <P> The following is a list of recurring characters from the FX television series It's Always Sunny in Philadelphia . </P> <Table> <Tr> <Th> Character </Th> <Th> Actor </Th> <Th_colspan="12"> Seasons </Th> </Tr> <Tr> <Th> </Th> <Th> </Th> <Th> </Th> <Th> </Th> <Th> 5 </Th> <Th> 6 </Th> <Th> 7 </Th> <Th> 8 </Th> <Th> 9 </Th> <Th> 10 </Th> <Th> 11 </Th> <Th> 12 </Th> </Tr> <Tr> <Th> Charlie Kelly </Th> <Td> Charlie Day </Td> <Td_colspan="12"> Main </Td> </Tr> <Tr> <Th> Ronald "Mac" McDonald </Th> <Td> Rob McElhenney </Td> <Td_colspan="12"> Main </Td> </Tr> <Tr> <Th> Dennis Reynolds </Th> <Td> Glenn Howerton </Td> <Td_colspan="12"> Main </Td> </Tr> <Tr> <Th> Deandra "Dee" Reynolds </Th> <Td> Kaitlin Olson </Td> <Td_colspan="12"> Main </Td> </Tr> <Tr> <Th> Frank Reynolds </Th> <Td> Danny DeVito </Td> <Td_colspan="1"> </Td> <Td_colspan="11"> Main </Td> </Tr> </Table> <Tr> <Th> Character </Th> <Th> Actor </Th> <Th_colspan="12"> Seasons </Th> </Tr>

When does frank show up in always sunny
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