The CW supernatural series "Arrow" returns with the premiere episode of season 4, titled "Green Arrow", at 8pm on Wednesday, 7 October. The sequel will begin by showing Oliver Queen and Felicity Smoak working together as a couple.

The official synopsis of episode 1 reads: "Oliver (Stephen Amell) and Felicity's (Emily Bett Rickards) blissful getaway is cut short when Thea (Willa Holland) and Laurel (Katie Cassidy) pay them a visit and tell Oliver they need his help back in Star City. The city has been attacked by "Ghosts," assassins led by a dangerous man named Damien Darhk (guest star Neal McDonough)."

CLICK HERE to watch the premiere episode of "Arrow" season 4 online.

Dishing out a few details about the first episode, Creator Marc Guggenheim said that the sequel will be very intense with the introduction of a truly villainous, pure evil character named Damien Darhk.

"With Deathstroke and with Ra's and Malcom [Merlyn], those were always guys who were the heroes of their own story. This year, we wanted to do something different. We wanted a villain who was truly villainous; who didn't care about morality in the way that the previous three big bads did. Damian is pure evil. He's the heart of darkness," MTV quoted Guggenheim as saying.

The executive producer even teased that Oliver and Thea will initially struggle to embrace their new roles as Green Arrow and Speedy, according to IGN.

While the billionaire playboy will try to find an answer for his inner quest -- "I'm the Green Arrow and I'm Oliver Queen. How can I be both at the same time?" -- his sister will be wrestling with the side effects of the Lazarus Pit.

In "Green Arrow", the viewers will also get to watch John Diggle (David Ramsey) in his new costume, Laurel Lance (Katie Cassidy) as Black Canary, Smoak as the new boss of Palmer Tech and how the rechristened Star City acknowledges the apparent death of Ray Palmer (Brandon Routh).

The CW will premiere "Arrow" season 4 at 8pm on Wednesday, 7 October.