Frank, working on a demolition gang, nearly gets flattened by a falling chimney. A letter arrives from Frank's grandfather, saying that he's coming over from Australia. He wants Frank and Betty to move to Australia to help him to run his sheep farm. Frank thinks that Jessica has swallowed a coin, so he sends for Doctor Mender. The doctor doesn't find anything wrong with Jessica. He's on his way to appear as a dame in a hospital pantomime. He's running late, so he asks Betty if he can change in the Spencers' spare bedroom. Frank is horrified when he sees Doctor Mender dressed up as a woman. He thinks he's a transvestite. Then Doctor Mender's colleague, Doctor Hutchings, turns up dressed as another of the ugly sisters. Hearing that the third ugly sister is too ill to appear, Frank offers his services as a stand-in. He goes off and reappears dressed as a Swiss peasant girl. Frank's grandfather arrives unexpectedly.... (thetvdb.com)