Caught by Starfleet and facing court martial, paranoia grows as Picard struggles to uncover whether a prodigal crewman from his past has returned as an ally – or an enemy…

The past comes back to haunt both Oliver and Laurel. Curtis is upset when he discovers that Diggle and Lyla have restarted The Ghost Initiative with Diaz, China White, Kane…

Still in prison, Oliver faces his biggest challenge yet. Meanwhile, Felicity gets an intriguing offer, and Diggle asks Curtis to go undercover for ARGUS.

In order to track down Diaz from inside prison, Oliver realizes that will require aligning with an old enemy. Meanwhile, in Star City, Felicity’s attempts to root out Diaz are…

Diaz targets Team Arrow and their loved ones. Oliver struggles with Felicity putting herself in danger when she gets the chance to stop Diaz for good.

With a new ally on his team, Oliver engages Diaz in an epic final battle.

War comes to Coulson’s doorstep in a way he never anticipated as shocking revelations are brought to light, and Skye struggles to control her new abilities but will soon make…

Oliver turns to an old friend to help battle Diaz; Rene is out of the hospital but has a hard time readjusting to life as Wild Dog; Lance discovers something…

Something new unfolds at a camp outside the prison. The addition of new members may threaten peace.

After things begin to calm down at the prison, Rick and his group now face imminent danger and destruction. This time, they might not win.