The synopsis for the "Arrow" season four premiere reveals Oliver Queen (Stephen Amell) will face not only face a new villain named Damien Darhk (Neil McDonough) but some animosity from his fellow vigilantes as well.
ARROW"Green Arrow" - (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)
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 (#401). Original airdate 10/7/2015.
Starring Amell, Rickards and Ramsey, "Arrow" season four is scheduled to debut Wednesday, Oct. 7 at 8 pm EST on The CW.