When Season 17 of Grey's Anatomy premiered on Nov. 12, it introduced viewers to Meredith's dream reunions with the dead. It now seems like anything goes, and that all bets are off with regard to cameos from past characters. 

Though her reunion on the beach with Derek initially appeared to be a one-off, it now looks like these meetings are going to be semi-regular on the show.

While battling COVID-19, Meredith subsequently met George O'Malley (who died in Season 5) on the beach in the Dec. 3 episode.

Fans are hoping that the next person to meet Meredith on the beach will be her half-sister, Lexie Gray (Chyler Leigh). Her Season 8 death from a plane crash was considered to be one of the most harrowing, as she had just reunited with her on-again-off-again boyfriend, Mark Sloan. 

A reunion between Lexie and Meredith would be especially poignant because Meredith has since reunited with another half-sister on the show, Maggie Pierce (Kelly McCreary).

Meredith realized the importance of connecting with Maggie, who is also Ellis Grey's biological daughter, largely because of the time she missed out on with her late sister.   

Of course, the current cast members have remained tight-lipped about any and all Season 17 spoilers. The show's official IMDb page does not reveal any more appearances from previous characters. 

Some have suspected that Meredith's continual dream sequences are a sign that she's going to be killed off in the Season 17 finale. Considering the fact that the show is called Grey's Anatomy, this theory is a bit more far-fetched.