A sinister tale of genius gone wrong, The Young Poisoner's Handbook chronicles a young man's descent into madness against the absurd backdrop of suburban English life. Hugh O'Conor plays Graham Young, a schoolboy from the London suburbs whose deadly obsession with toxic substances causes him to dabble in experimental murder.

D.I. Tom Thorne's latest case puts him on the hunt for not one, but two serial killers, who seem to be working together, yet killing separately.

N has been a day patient at north London's Dorothy Fish day hospital for 13 years - her ambition is never to leave. Then she meets glamourous new patient Poppy Shakespeare, an ad agency receptionist convinced she's not mad.