The Law & Order: SVU ranks continue to thin.

Dann Florek, who plays Captain Donald Cragen, is leaving the veteran NBC drama this season.

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The actor announced via Twitter that last Friday was his final day of filming after 15 seasons on the L&O spin-off. He originated the role on the flagship series.

Friday was the last day 4 Cragen/Florek. It was a sweet send off! But he'll live on in syndication land 4 evah! — Dann Florek (@dannflorek) December 9, 2013

Showrunner Warren Leight also marked Florek’s final episode on Twitter with a series of photos.

Saluting the Captain at the close of his 401st episode — all respect to @dannflorek pic.twitter.com/JDfUJpuYB2 — Warren Leight (@warrenleightTV) December 10, 2013

Earlier this season, Richard Belzer’s Sgt. John Munch retired, with the actor being downgraded from series regular status to recurring player.