<P> "Hello, Little Girl" is the 83rd episode of the ABC television series, Desperate Housewives . It is the thirteenth episode of the show's fourth season and aired on April 27, 2008, in the United States . The episode title references the Stephen Sondheim song of the same name from the musical Into the Woods . </P> <P> The song "Wow" by Kylie Minogue was released as promotion for this episode . </P> <P> The next morning, after the ball, Lynette asks Tom where he had been when the fire took place at Rick's restaurant . Tom denies that he did it and he says he was listening to the car radio about the Cavaliers' basketball game and assures her that he did not start the fire . Rick comes by to the pizzeria and confronts Tom about the fire and that he found a matchbook from Scavo's pizzeria at the back of his restaurant . Tom again denies that he committed the arson and the men start to fight . Lynette tries to break the fight but fails and Andrew has to call the police . The incident leads to the police for an investigation about the fire . While waiting for Tom being questioned by the police, Rick expresses to Lynette that he missed her so much, and that makes Lynette uncomfortable so she barges into the investigation room . Lynette lies to the police that she saw Tom leave the ball momentarily, providing him with an alibi . After the police's investigation, Lynette and Tom argue when she still does not believe Tom . Tom reveals that he did not trust her with Rick, even though Lynette assured him that nothing happened between them . Later that night, Lynette finds out that Porter and Preston are the ones who set Rick's restaurant on fire, as the twins worried that Rick may try to take Lynette away from her family . </P> <P> Katherine decides to start a business as a caterer to earn some money and she asks Bree to join . At first Bree refuses due to previous conflicts, but later agrees after some convincing . When Dylan is driving back home one day, she is stopped by a police officer for speeding, and the police officer lets her go with a warning . She meets the police officer again the next day, and he reveals that he is her father, Wayne Davis . He tells her that he tried to track her down and stopped her even though she was not speeding as he just wanted to see Dylan . He admits that he has been abusive to Katherine in the past, but he tells Dylan that her mother is not just a victim in this incident, and also beat him more severely than he would beat her . However, Dylan wants to talk to Wayne and she swears that she will not tell her mother about meeting him . When Dylan tries to help out Katherine to print out invitation cards for the anniversary Katherine is hired to plan, Dylan takes the opportunity to have dinner with her father with the excuse that she is going to the print shop . </P>

Who started the fire at rick's on desperate housewives