<Tr> <Th> 146 </Th> <Td> 17 </Td> <Td> "Hal's Dentist" </Td> <Td> Steve Love </Td> <Td> Jay Kogen </Td> <Td> March 26, 2006 (2006 - 03 - 26) </Td> <Td> 06 - 05 - 717 </Td> </Tr> <Tr> <Td_colspan="7"> Hal's friend Trey tells him to come to his dental office when he cracks a tooth during a poker game, but their friendship goes into jeopardy when Hal's faced with a $2,000 bill and causes a fight between them . Meanwhile, Reese teaches Lois how to ride a bike . Malcolm and Dewey find sleeping as their new favorite pastime after finding a new mattress in the street (which literally fell from the sky). </Td> </Tr> <Tr> <Th> 147 </Th> <Td> 18 </Td> <Td> "Bomb Shelter" </Td> <Td> Matthew Carlson </Td> <Td> Rob Ulin </Td> <Td> April 2, 2006 (2006 - 04 - 02) </Td> <Td> 06 - 05 - 719 </Td> </Tr> <Tr> <Td_colspan="7"> Malcolm joins a local dance class to meet a cute girl, but after discovering she is a poor dancer, he realizes that he must accept Danielle, the unattractive, but most talented partner in order to win the competition . While trying to bury their father's broken trophy, Reese and Dewey discover an underground bomb shelter in the backyard and lock Hal in it, while Lois tries to win a new truck at the shopping mall . Hal soon discovers the bomb shelter is paradise, and Lois plays mind games for the truck . </Td> </Tr>

Malcolm in the middle season 2 episode 17