Thomas wrestles with a growing attraction to Kitty, and Joan reveals a dark secret to one of her patients.While Thomas may not be prevailing with Kitty, he is having success on the wards with a pioneering wound irrigation system. Thomas's test subject is doing well, but a fellow surgeon of the old-school, Major Yelland, is dismissive of his techniques. Will Miles be able to placate his increasingly riled friend?A terrified patient faces court martial. There's little anyone can do, and yet, his presence unnerves the staff and patients, a constant reminder of the perils of overstepping the rules. This warning is particularly pertinent for some, as a proud Irish non-commissioned officer faces rebellion from his young protégé.