'Grey's Anatomy': T.R. Knight Reacts to Season 17 Return With Touching Message

‘Grey’s Anatomy’: T.R. Knight Returns as George O’Malley

Watch Prince George Holds King Charles' Robe as He Enters Corona…

Prince George Makes Funny Faces as King Charles Is Crowned at Co…

Ariana Madix Shares What She's Learned About Herself From Scando…

Why Prince Harry Will Not Have a Role at King Charles’ Coronation

Drew Barrymore Hints at What to Expect From 2023 MTV Movie & TV …

Met Gala 2023: Keke Palmer on Son Leodis Helping Her Get Ready (…

Met Gala Moments: Iconic Moments and What to Expect at 2023 Event

‘Welcome to Wrexham’: How Taylor Swift Might Contribute to Seaso…

Met Gala 2023: Kim Petras on Being 'Nervous' to Sport Sky-High P…

See Keke Palmer's Met Gala 2023 Look Get Crafted by Sergio Hudso…

Rihanna Shares How Pregnancy No. 2 Is Different (Exclusive)

‘American Idol’: Katy Perry Reacts to Lionel Richie Claiming She…

Bella Ramsey Gets Overwhelmed at First Met Gala (Exclusive)

'90 Day Fiancé': Debbie Walks Off on Oussama After He Tells Her …

'Not Dead Yet' Finale: Gina Rodriguez Entertains Meeting Up With…

'Guardians of the Galaxy: Vol. 3': Chukwudi Iwuji on Playing 'Na…

Savannah Chrisley Reveals Parents Todd and Julie Can't Speak Whi…

'Gran Turismo' Trailer No. 1
Spoiler alert! Do not proceed if you have not watched Thursday's episode of Grey's Anatomy.
Grey's Anatomy promised "another person from Meredith's past" would resurface as she continued her battle against COVID -- and it was a doozy.
The latest episode, which aired Thursday, saw the long-awaited return of T.R. Knight's George O'Malley, who had a heroic but devastating death in the season 6 premiere. It marked Knight's first appearance on the series in over a decade.
Knight reprised his character when we were transported once again into Meredith's COVID dream to the same sandy beach where she reunited with her late husband, Derek Shepherd (Patrick Dempsey). The two friends had several poignant conversations about grief, the afterlife and death -- and had the closure they were never able to have following George's premature death.
Following Thursday's episode, Knight took to Instagram to express his gratitude to original cast members Ellen Pompeo, Chandra Wilson and James Pickens Jr., as well as executive producer Krista Vernoff for bringing him back into the Grey's fold after so many years.

"George O'Malley will always claim my heart," Knight wrote in a brief but emotional message, which was accompanied by a heart emoji.
"Thank you to Ellen, Chandra, Jim, Krista and all the familiar faces for once again sharing your beautiful light," his post concluded.
Knight played George for the first five seasons on Grey's before departing the series in 2009. The character was killed off in the season 6 premiere following a brutal accident in the fifth season finale, which remains one of the most stunning TV developments in Grey's history.
Knight's reunion with Pompeo comes nine months after the former co-stars reunited on a hike in Los Angeles after Justin Chambers' last episode aired.
"Old friends are the BEST friends @t.r.knight... but like we aren’t old... we’ve just known each other for a very long time yes yes that’s it....," Pompeo captioned the smiley photo on Instagram back in March.
Knight also reshared the photo on his own Instagram, joking, "I’m just happy we met when we were fetuses."
Grey's Anatomy airs Thursdays at 9 p.m. ET/PT on ABC. For more on McDreamy's return, watch the video below.
To stay up to date on breaking TV news, sign up for ET's daily newsletter.
RELATED CONTENT:
'Grey's' Brings Back Another Beloved Character in Emotional Reunion
Giacomo Gianniotti Teases 'Grey's' Cast Return: 'Anything Is Possible'
'Grey's' Reveals Another Major Return in Season 17: Who Could It Be?