The official description for the season four premiere titled “Green Arrow” has been released, which reveals why Thea and Laurel ask Oliver and Felicity to return to Star City. The threat of Damien Darhk’s assassins called the Ghosts!
You can check out the official description of the episode below:
MY NAME IS THE GREEN ARROW —
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 Neil McDonough). However, when Oliver returns, Diggle (David Ramsey) makes it very clear that he doesn’t want Oliver on the team. Thor Freudenthal directed the episode with story by Greg Berlanti & Beth Schwartz and teleplay by Marc Guggenheim & Wendy Mericle.
“Arrow” returns for it’s fourth season on Wednesday, October 7th.