Roy Harper Returns, Team Arrow Heads To Russia on 'Arrow' Tonight!

Roy Harper (Colton Haynes) gets an unsuspecting visitor in this still from tonight’s all new Arrow!

In “Prochnost”, upon learning the key to oppose The Monitor (LaMonica Garrett), Oliver (Stephen Amell) and team return to Russia on a mission to gather the necessary materials.

Diggle (David Ramsey) reunites with a figure from his past.

Katherine McNamara recently spoke about Mia getting to show Oliver her skills in the episode.

“For Mia, it’s the first time that her father really gets to see her skill set, and she gets to show her father what she does best. But alternatively, having just lost Zoe and gone through her first major loss as a fighter, she’s shaken and she is kind of off her center a little bit. That’s a struggle for her going through this episode. Whether or not she is as successful as she wants to be remains to be seen,” she told EW.

“But for me going into this episode, I was so excited. I fell in love with fighting on screen during Shadowhunters. I had such amazing stunt coordinators on that show that really took time and taught me how to fight,” Katherine added. “I was so thrilled to be able to carry that skill set into this show, and even more thrilled that the stunt coordinators on this job have given me so many opportunities to use those skills. In this episode in particular, I’m really proud of [the fact that] I had the opportunity to do most if not all of my fighting in the episode. There were a few little aerial trick pieces that are way beyond my league, but the majority of the actual fighting was all me in this episode.”