Arrow season 3 premiere
Arrow Season 3 poster The CW

Arrow Season 3 returns with its third episode today, 22nd October at 8.00 pm ET on the CW.

The third episode of the hit superhero series is titled Corto Maltese. In it Oliver searches for Thea in Corto Maltese and Diggle tracks A.R.G.U.S. Agent Mark Shaw.

Click here to watch the episode online.

The episode synopsis reads:

Oliver (Stephen Amell) decides it's time for Thea (Willa Holland) to come back to Starling City, so he packs for Corto Maltese, where Felicity (Emily Bett Rickards) has traced Thea's whereabouts. Lyla (guest star Audrey Marie Anderson) asks Diggle (David Ramsey) to go with Oliver because one of her field operatives, Mark Shaw (guest star David Cubitt), has gone dark in Corto Maltese and she'd like him to look into it. Feeling responsible for Thea's departure, Roy (Colton Haynes) joins Oliver and Diggle on their journey. Shaw double-crosses Diggle, putting numerous A.R.G.U.S. agents, including Lyla, at risk. Meanwhile, Laurel (Katie Cassidy) meets Ted Grant (J.R. Ramirez), and Felicity adjusts to her new job.

In the previous episode, Arrow fought the archer assassin who killed Sara, but he was not the culprit, which left the team with a cold trail. Oliver and company buried Sara in her old grave, and Diggle and Lyla named their daughter after her. However, Laurel was unable to tell her father about Sara's death.

Meanwhile, Felicity finally agreed to work at Queen Consolidated for Ray Palmer while Roy showed Oliver Thea's note, and Oliver decided it was time to bring his sister home.

In an extended preview, Oliver goes on a search to find Thea. However, he ends up fighting off Merlyn's forces. During his hunt, he will be joined by Diggle, Lyla's family and the men of Team Arrow.

Watch the promo here.