When Arrow returns with new episodes next month, the CW drama will bring along a fan-favorite character. The network has released the synopsis for the 15th episode of Season 6, awhich heralds the return of Colton Haynes as Roy Harper.

The episode, titled "Doppelganger," indicates that Roy will come back to Star City pursued by trouble. The synopsis is pretty vague, which suggests the circumstances surrounding Roy's return may be a little dubious. With a title like "Doppelganger," don't be surprised to see more than one Roy running around Star City.

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Haynes' Roy Harper was introduced during Arrow's first season. The actor became a series regular with Season 2, until his abrupt departure midway through Season 3. The character later appeared for an episode of Season 4. This upcoming guest turn will mark his first since then.

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Here is the official synopsis for "Doppelganger," which airs March 8:

ARROW

“Doppelganger” — (9:00-10:00 p.m. ET) (Content Rating TBD) (HDTV)

ROY HARPER RETURNS — Oliver (Stephen Amell) and Thea (Willa Holland) are shocked to hear that Roy Harper (guest star Colton Haynes) is back in Star City. However, when they discover the circumstances of Roy’s return, Oliver and Thea realize that Roy is in trouble and jump in to save him. Black Siren (Katie Cassidy) makes a shocking decision. Kristin Windell directed the episode with story by Christos Gage & Ruth Fletcher Gage and teleplay by Speed Weed (#615). Original airdate 3/8/2018.

Airing Thursday nights at 8 p.m. on The CW, Arrow stars Stephen Amell, David Ramsey, Willa Holland, Paul Blackthorne, Emily Bett Rickards and Echo Kellum.