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The 10th and final season of Doc Martin<\/a> continues this week, with Wednesday\u2019s brand-new episode introducing a new character played by Downton Abbey<\/a> star Lesley Nicol.<\/p>\n The Beryl Patmore actress plays Irene Moore in the episode, a recently widowed woman who is advised by Martin Clunes\u2019s Doc<\/a> to stop cold water swimming until they\u2019ve ruled out the cause of her migraines.<\/p>\n In a clip from the episode, provided exclusively to RadioTimes.com<\/a>, Selina Cadell\u2019s Mrs Tishell tells Irene to listen to the Doc, but she says swimming is when she feels closest to her late husband.<\/p>\n Initially struggling to relate despite having lost a husband herself, Mrs Tishell then says that her husband \u201cliked caravans, so whenever I see a caravan I think, \u2018Oh, Clive would have liked that.’\u201d You can watch the clip right here, now.<\/p>