It's three months since the riot and Deborah (Pamela Nomvete) has clawed herself back to the top as Governor of the prison.
She has placed a pissed-off-with-the-world Tyson (Lorcia Cooper) in power, allowing her access to more contraband than the prison has ever seen.
How long before the battle of wills commences?
Joining the new season are Nthati Moshesh as Masabata and Natasha Thahane as Katlego.
Season 4 is produced by Black Brain Pictures for Mzansi Magic with executive producers Mandla N, Mpumi Nhlapo and Annelie van Rooyen. Dominique Masson is a producer.
The show was created and directed by Mandla N; and the Season 4 head writers are Mandla N and Meren Reddy.