Arrow: Sky 1, 8pm
A furious Nyssa heads back to Starling City to find out what happened to Sara, joining forces with Oliver to hunt for Malcolm Merlyn (John Barrowman), who is at the top of their list of suspects.
But as they investigate, Nyssa's desire for revenge threatens to cloud her judgement.
Life Story: BBC One, 9pm
David Attenborough explores courtship in the penultimate episode of the BBC wildlife series.
Most extraordinary display of all is created by a tiny, drab male pufferfish. He builds a spectacular submarine 'crop circle' in the sand - the most perfect and complex structure created by any animal. The crop circles were only discovered in southern Japan in 1995, and the fish architect was only identified in 2011.
What to Read Next
The Fall: BBC Two, 9pm
Stella Gibson (Gillian Anderson) realises that her mistakes have put the life of witness Rose Stagg (Valene Kane) in danger.
Desperate to save Rose's life, the police step up the investigation, while Spector (Jamie Dornan) continues to stalk Belfast's streets.
Babylon: Channel 4, 10pm
Danny Boyle's police and PR dramedy series continues.
Eager to justify Commissioner Miller's (James Nesbitt) faith in her, Liz (Brit Marling) presents her vision for Metwork: the force's very own digital news channel that will rival established outlets.
