There is chaos when a riot breaks out at Fenchurch East prison. The riot team ends up being largely outnumbered and Sgt Viv James is left behind when they are forced to retreat. Jim blames Gene for Viv's capture on Gene. Alex continues to doubt Gene. After Alex is unable to negotiate Viv's release things don't look good. Alex finds herself having to put her differences with Gene to one side to avert a tragedy.