 
<translate> Ozi dị mkpa bụ: Ọ bụ ezie na a kpọtụrụ aha na-agafe n'oge niile na-esote oge, Burke na-alaghachi na oge nke iri iji mechie ọpụpụ Cristina Yang na usoro ahụ. Azịza ya bụ oge nke iri. <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. 