Sherlock and Joan question how well they know Shinwell when they investigate the possibility he may have gotten away with the unsolved murder of his friend, a fellow gang member….

Love is in the air as the inmates prepare for a Valentine’s Day party; Red makes an intriguing new discovery. Larry asks Piper to be his prison mole.

A young woman escapes from a polygamous cult.

The investigation into a helicopter bombing points to a victim’s wife and her unconventional financial advisers.