Several episode titles for Arrow's final season have been revealed, and they do not bode well for Oliver Queen.

SpoilerTV got a hold of the titles for Arrow Season 8, episodes 5 through 8, and they point to an ominous future for the Green Arrow. Episode 8.05 is titled "Prochnost," followed by 8.06 "Reset" and 8.07 "Purgatory."

While the titles themselves don't reveal any plot details, "Prochnost" is the Russian word for "durability" or "endurance," which could mean that that episode will revisit Oliver's past in Russia and his friendship with Anatoly Knyazev (David Nykl). The word has been uttered by several characters throughout Arrow's seven-season run.

RELATED: Arrow: Heroes Fall & Legends Rise in Season 8 Poster

If Nykl is set to appear in the final season, he will not be the only familiar face stopping by. John Barrowman, who portrayed Oliver's first nemesis Malcolm Merlyn, and Susanna Thompson, who starred as Oliver's mother Moira, are set to guest star. Colin Donnell and Josh Segarra, who play Tommy Merlyn and Adrian "Prometheus" Chase respectively, will also reprise their roles in Season 8 of the superhero drama. Finally, Rila Fukushima will return as Tatsu Yamashiro, aka Katana.

Returning Tuesday, Oct. 15 at 9 p.m. ET/PT on The CW, Arrow stars Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Rick Gonzalez as Wild Dog, Juliana Harkavy as Black Canary, Katie Cassidy as Black Siren, Katherine McNamara as Mia Smoak, Joseph David-Jones as Connor Hawke and Ben Lewis as William Clayton-Queen.

KEEP READING: Arrow: Yet Another Former Series Regular Is Returning for Season 8