Diyah Pera/The CW
September 29, 2016 at 09:56 PM EDT

Another familiar face is returning to Arrow for the upcoming 100th episode!

EW has learned exclusively that Susanna Thompson will reprise her role as Moira Queen during the landmark hour. Details on how she’s returning are being kept under wraps.

An original series regular, Thompson left The CW show after season 2 when the Queen matriarch was killed by Deathstroke (Manu Bennet). The actress will next appear on NBC’s new drama Timeless.

Curiously, Deathstroke is also slated to return in the 100th episode, as revealed in a photo posted by Stephen Amell. Katie Cassidy and Jamey Sheridan will also reprise their roles as Laurel Lance and Robert Queen, respectively, during the hour.

Arrow returns Wednesday at 8 p.m. ET on The CW.

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