 In "The Frog and the Pussycat", Robdal and Kelly are again arrested on suspicion of murdering the sole eyewitness to the Margate robbery, although Robdal discovers it was a fraud by the police.However, Robdal is incarcerated when it is revealed one of the stolen jewels was pawned by Joan, who is "working" as Robdal's charlady (in order to fund Del's film).While in prison, Robdal implores Joan to leave London with him to his seaside home with Rodney.