The latest season of DCTV's Arrow has seen its protagonist, Oliver Queen, locked up in a maximum security prison after confessing to being the Green Arrow in the final episodes of Season 6. And judging by the latest plot description of an upcoming episode, Oliver's troubles will extend beyond his incarceration.

In Season 7's fifth episode, titled "The Demon", Oliver's wife Felicity discovering a previously unknown secret about her husband while fellow Star City superhero Mister Terrific is recruited by ARGUS to go undercover. The full episode description from the The CW is below:

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ARROW

“The Demon” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

FELICTY DISCOVERS A SECRET ABOUT OLIVER; CURTIS GOES UNDERCOVER — Felicity (Emily Bett Rickards) learns something new about Oliver (Stephen Amell) that shocks her. Meanwhile, Diggle (David Ramsey) asks Curtis (Echo Kellum) to go undercover for ARGUS. Dinah (Juliana Harkavy) works with an unlikely ally. Mark Bunting directed the episode written by Benjamin Raab & Deric A. Hughes (#705). Original airdate 11/12/2018.

With Oliver facing enemies both inside and outside the prison, it looks like his allies will have their hands full as he faces these threats alone.

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Airing Mondays at 8 pm ET/PT on The CW for its seventh season, Arrow stars Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Emily Bett Rickards as Felicity Smoak, Rick Gonzalez as Wild Dog, Echo Kellum as Mr. Terrific, Juliana Harkavy as Black Canary, Colton Haynes as Arsenal, Kirk Acevedo as Diaz, and Katie Cassidy as Black Siren.