Marion and the Pipe

Marion and the Pipe is the twelfth episode of the eighteenth season.

Plot
Marion uncovers what she thinks is the mast of a Viking ship while doing some repairs on an embankment. Thomas suspects that she may have hit a water pipe, but Marion is not so sure. The following day, when Thomas notices flooding near the bank, she has to reassess her opinion.

Characters

 * Thomas
 * Marion