“Grey’s Anatomy” star Isaiah Washington is in hot water with ABC, after using the derogatory term “faggot” in the press room at the Golden Globes.

“We take this situation very seriously,” the network said in a statement. “His actions are unacceptable and are being addressed.”

Washington released his own statement on Thursday, apologizing to co-star T.R. Knight, “my colleagues, the fans of the show and especially the lesbian and gay community for using a word that is unacceptable in any context or circumstance.”

“I can neither defend nor explain my behavior,” he said. “I can also no longer deny to myself that there are issues I obviously need to examine within my own soul, and I’ve asked for help.”

The controversy comes several months after an argument that occurred on-set in October. At the time, Washington allegedly clashed with co-star Patrick Dempsey and referred to Knight as a “faggot.”

Knight announced soon after that he’s gay. Without mentioning what was said, Washington released an apology and all was forgotten — until Monday night.

This new episode erupted after a reporter asked “Grey’s” exec producer Shonda Rhimes — clutching the Golden Globe trophy for dramatic TV series — about the October scuffle. Washington hopped in front of the microphone and claimed he “did not call T.R. (Knight) a faggot. Never happened.”

That upset other cast members, particularly Knight, who told Ellen DeGeneres on her show this week that Washington did indeed use the term, and that it convinced him to come out of the closet. Co-star Katherine Heigl also told “Access Hollywood” she was upset over Washington’s use of the word.

“We dealt with the original situation in October, and thought the issue resolved,” the ABC statement said. “Therefore, we are greatly dismayed that Mr. Washington chose to use such inappropriate language at the Golden Globes, language that he himself deemed ‘unfortunate’ in his previous public apology.”