Mabel Watson is first seen when she and Lord Manton's valet, Kenneth Barnes, help load suitcases of their employers for the train journey to Southampton. On board the ship, Barnes asks if they are in the Maid's and Valet's Saloon. Stewardess Desmond orders everyone to take their seats for dinner. Watson asks if they, being servants from English and Scottish families, can sit together, which Annie allowes. Later, they make up the bed for the Mantons. Barnes tries to apologize to Watson again.