Complex sentence: In the Ward, the Doctor meets several humanoid feline nuns of the Sisters of Plenitude who are overseeing the patients, all who have incurable maladies but are somehow being cured by the Sisters.
Split into simpler sentences: In the Ward, the Doctor meets several humanoid feline nuns of the Sisters of Plenitude who are overseeing the patients. The patients catch the attention of the Doctor because they all have incurable maladies but are somehow being cured by the Sisters.