Series 6 - Episode 8 (S06E08)

Following her arrest for murder, Tanya is interrogated regarding the poisoning of Al, but the evidence against her appears flimsy, prompting authorities to question other inmates as well. As the investigation reveals that the poison originated from the rhubarb, the Costa Cons scramble to eliminate any damaging evidence, though it may already be too late. Meanwhile, the Julies celebrate a memorable birthday bash. In an unexpected turn, Frances and Tanya form an alliance when a scheme aimed at targeting Tanya is uncovered.