<Tr> <Td> 1988 </Td> <Td> Miles from Home </Td> <Td> Exotic Dancer </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Uncle Buck </Td> <Td> Marcie Dahlgren - Frost </Td> <Td> </Td> </Tr> <Tr> <Td> 1990 </Td> <Td> Internal Affairs </Td> <Td> Amy Wallace </Td> <Td> </Td> </Tr> <Tr> <Td> 1990 </Td> <Td> Pacific Heights </Td> <Td> Stephanie MacDonald </Td> <Td> </Td> </Tr>

Who plays sheldon cooper's sister in the big bang theory