The CW has just released a serie of promotional images from the episode 2x06 of Arrow titled 'Keep Your Enemies Closer', airing on November 13. The images includes lots of Diggle, but also some Olicity, Roy, Thea, Moira, and boat flashbacks with Sara, Oliver and Professor Ivo.
While Summer Glau's character Isabel Rochev appears in this episode, there's no trace of Summer in this first batch of images but hopefully The CW will release a second batch of photos as we get closer to the airing date.
And now the promo images.
Here's the official description for the episode (mentioning Summer Glau):
DIGGLE GOES AFTER DEADSHOT — Amanda Waller (guest star Cynthia Addai-Robinson) sends A.R.G.U.S. agents to kidnap Diggle (David Ramsey). Waller informs Diggle that Lyla (guest star Audrey Marie Anderson) has gone missing after following a lead on Deadshot (guest star Michael Rowe) in Moscow. When Diggle tells the team he’s headed to Russia to rescue Lyla, Oliver (Stephen Amell) and Felicity (Emily Bett Rickards) decide to join, but things get messy when Isabel (guest star Summer Glau) shows up on the tarmac and insists on joining Oliver’s “work trip.” Meanwhile, Moira’s (Susanna Thompson) lawyer, Jean (guest star Teryl Rothery), tells Thea (Willa Holland) that dating Roy (Colton Haynes), a known criminal, is hurting her mother’s case. Guy Bee directed the episode written by Ben Sokolowski & Beth Schwartz (A206).
May I remind you that DC's character Isabel Rochev is from Russia. However, we don't know yet if Arrow writers are going to use it in the show. Oliver's trip to Russia might be an opportunity to do so, don't you think?