The Play on One S03 E06 Yellowbacks

In a very near-future Britain, when draconian powers have been given to the authorities under the new Secret Emergency Provisions of the Dangerous Disease Act, Dr Juliet Horwitz finds herself hooded, handcuffed and interrogated by a ruthless pair, as does scientist Alex McPherson, both of whom are the key to finding Martin Pitt, a virus carrier who has disappeared.