(Photo: The CW)

According to a tweet from series star Stephen Amell, the Season Four trailer for Arrow will be released tomorrow (September 4) at 6 p.m. ET on Amell's Facebook page.

The season hits in October, introducing new threats to Team Arrow and tying in with the Olicity-heavy Season Three finale.

Season 4 trailer. Tomorrow. 6 pm EST. https://t.co/3NTa2SRBQ7 — Stephen Amell (@amellywood) September 4, 2015

This season sees Team Arrow facing off against Damien Darhk (Neal McDonough of Captain America: The First Avenger and Agent Carter fame) and H.I.V.E., the organization that killed John Diggle's brother. Meanwhile, Malcolm Merlyn has been promoted to the rank of Ra's al Ghul, leading to the decision to resurrect Sara Lance using the Lazarus Pit.

Arrow starts back up again on October 7 and airs Wednesdays at 8 p.m. ET/PT.