'Grey's Anatomy' season 13 spoilers: familiar face to return once again?

Many fans were excited after seeing a familiar face in the most recent episode of the series "Grey's Anatomy."

Viewers saw the Dr. Derek Shepherd, played by Patrick Dempsey, once again after a long absence. A past season of "Grey's Anatomy" killed off the character, which broke the hearts of fans, as well as fellow character Meredith, played by Ellen Pompeo.

However, the most recent episode of "Grey's Anatomy" season 13 showed him in a vision of Meredith. The surprise was well received, as many enjoyed their relationship in the past installments of the series.

Due to his appearance, many believe that the current season could bring back many original characters of the show. Though it is unlikely to see Derek's return, fans speculate that the episodes ahead could show the return of Cristina, played by Sandra Oh.

Dr. Cristina left the hospital after receiving a position in another hospital. Despite this, many speculate that it is easy to bring about the character's return. In addition, reports indicated that the upcoming episodes will put its focus back on the original characters of the series.

Unfortunately, Oh explained that she has no plans to return to the show. She revealed that she does not see purpose in returning. She said, "I felt I had done my job. I had explored everything that I could with my character. I loved the camaraderie of that show. So the motivation to go was creative. I am so grateful that [series creator] Shonda Rhimes understood that I needed to make that choice."

Nevertheless, many are excited to see what the upcoming episodes of "Grey's Anatomy" season 13 will bring to the small screens. Some speculate that Oh might still make a cameo in the future, which will surely bring some nostalgia.

"Grey's Anatomy" airs its season 13 every Thursday nights on ABC.