 
<translate> Bayanin da ya dace shine: Duk da yake an ambaci shi a wucewa a cikin lokutan baya, Burke a hukumance ya dawo a kakar wasa ta goma don kammala ficewar Cristina Yang daga jerin. Amsar ita ce kakar goma. <eng> The relevant information is: While mentioned in passing throughout later seasons, Burke officially returns in the tenth season in order to conclude Cristina Yang's departure from the series. The answer is the tenth season. 