Elizabeth helps Allie plan a birthday dance. Nathan struggles with Allie growing up. Rosemary and Bill team up again to investigate a train robbery. Lucas lends Edie a hand.

Abby finds herself playing both lawyer and counsellor as she helps a paranoid and deeply closeted actor avoid being outed to the public when his bitter ex writes a play about him.

As Crystal struggles through a typical day in the life of a med student, everyone else finds themselves forced to finally deal with the simmering problems they've been trying to ignore.

Rowan must find Lasher in order to right her wrongs. But even Sip doesn't know where Lasher is.

It's just another day in Paradise until Agent Xavier Collins discovers one of the world's most powerful individuals has been viciously murdered. Xavier analyzes the crime scene while recalling his complex relationship with the victim.

Dr. John Watson resumes his medical career as the head of a clinic dedicated to treating rare disorders six months after the death of his friend and partner, Sherlock Holmes, at the hands of Moriarty.

Stephen welcomes football coach Deion Sanders and a musical performance by Kane Brown.

Peter and Rose infiltrate a party at the Iranian ambassador's home, arousing Javad's suspicion. Tomás and Markus lock horns over the Foxglove plan.

Dexter needs to find a new hiding place after his most recent dumping ground is blown. Harry and LaGuerta pitch a controversial theory to Spencer, as the hunt for a missing child continues. Deb gets in trouble for an outburst in volleyball practice.

As command of the operation shifts out his hands, Bosko shares a grim reality; Naomi receives troubling news out of Iran; Richardson runs a rogue operation; Felix gets overtaken by events; Martian, desperate, makes a devil's bargain.

Victoria Coren Mitchell hosts the quiz where knowledge only gets you so far - logic and lateral thinking are the vital extra ingredients. Two teams face off in an attempt to get through to the semi-finals. What connects the following: excels, robust, Liberec and Arabic?

When the police raid the nail bar having learnt that Kenny has gone missing, dealer Khalad has no choice but to inform Turuk.

When a mysterious contagion starts to spread on a flight from Mumbai, Dr Nikki Alexander faces a race against time - at 30,000 feet - to contain a deadly illness.

Tamar recruits an unexpected collaborator. Peterson gets closer to fulfilling his life's mission. Nahid makes the hardest decision of her life. Nissan is forced to confront his bloody past.

Peterson completes his mission, and reveals his astonishing and deadly intent. Nahid and Tamar settle the scores. Tamar and Faraz confront each other, and face difficult choices. The countdown begins, the moment of truth is coming.