Tonight's top TV includes psychological drama The Sister, the second of this week’s Eurovision semi-finals, the excellent documentary series Saved By a Stranger, and the final of Taskmaster . . .

Pick of the Day

The Sister, 10.15pm, RTÉ One

This is a four-part murder mystery/psychological drama, starring Russell Tovey, Bertie Carvel and Amanda Root.

Luther creator Neil Cross adapted his book, the spooky thriller Burial, for the series.

The story goes that Nathan Redman has spent years trying to atone for a terrible event from his past, the worst night of his life: a party that led to the sudden, shocking death of a young woman.

Only he and Bob, an old acquaintance of his, know what really happened and they have resolved to keep it that way. But one rainy night, years later, a ragged-looking Bob appears at Nathan's door with horrifying news.

Don’t Miss

Eurovision, 8.00pm, RTÉ2

Here's the second of this week's Eurovision Song Contest semi-finals, live from the Rotterdam Ahoy Arena, as another 17 acts representing their nations battle it out in a bid to secure one of the ten remaining places in Saturday's final.

Commentary, as usual, from the legendary Marty Whelan (above). But it's all a bit academic following the disappointment of Lesley Roy’s surprise failure to reach Saturday’s final after her elimination in Tuesday’s semi-final.

Saved By a Stranger, 9.00pm, BBC Tw

Presented by Anita Rani, this is a marvelous, life-affirming series of true stories.

In this week’s episode, identical twin brothers George and Peter - who fled Nazi Germany in 1939 - search for the family of the man who helped them escape.

Plus, Clare, who housed 21 child refugees from war-torn Bosnia, looks for their mystery schoolgirl translator Petra, whose language skills allowed the children to properly communicate and share the horrors they had endured before they fled.

The Big DIY Challenge, 8.30pm, RTÉ One

PJ Gallagher (above) is back tasking once more, and this week visits Emma Corbett and her family in Toorard in Mayo, where they are attempting a massive makeover in a tiny bathroom.

He also virtually drops in to party with Keith Caffrey and his wife Angie who are building a colourful Ibiza-inspired garden in Offaly.

The Handmaid’s Tale, 10.15pm, RTÉ2

As season four of this Elisabeth Moss-starring dystopian drama continues, June faces a vengeful Aunt Lydia and endures a torturous interrogation.

Meanwhile, Nick and Lawrence collaborate to protect June. And in Toronto, Luke struggles with how to help June and Hannah.

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New or Returning Shows

Plean Bee, 9.30pm, TG4

It’s World Bee Day! No, not bidet. Bee. Day.

Here’s TG4’s contribution to the buzz, celebrating those wonderful winged creatures who work so hard to make honey.

Bees and pollinators have been declining in Ireland and other countries for decades - as a result of mono-culture, pollution, climate change and disease.

This decline comes at a huge cost to agriculture, to wildflowers and trees, and to many parts of the natural world that we take for granted.

Plean Bee is about the internationally acclaimed All Ireland Pollinator Plan and how it is mobilising individuals and communities to reverse pollinator decline across all of Ireland.

We Are Lady Parts, 10.00pm, Channel 4

Anjana Vasan, Sarah Kameela Impey, Juliette Motamed and Lucie Shorthouse star in this new comedy - think: a latterday Goodness Gracious Me with loud guitars - charting the highs and lows of Muslim punk band Lady Parts.

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The story's seen through the eyes of Amina Hussain - a geeky microbiology PhD student, who is recruited to be their unlikely lead guitarist at the instigation of fiery frontwoman Saira, who sees something in Amina that the others can't.

Meanwhile, Amina is torn between two different worlds and on the lookout for love, romance - and a husband.

Subnormal: A British Scandal, 9.00pm, BBC One

Bit of an eye-opener this. But not that surprising, really.

In the 1960s, West Indian migrants to the UK, a land they counted on providing better opportunities for their children.

But there are suggestions that before having a chance to develop intellectually, their offspring were labelled as "stupid, difficult and disruptive" as psychologists such as Hans Eysenck and Arthur Jensen theorised that black people were genetically less intelligent than white folk.

IQ tests were then based on these theories, with the odds stacked against children from the West Indies.

Featuring interviews with key participants of the time, this documentary examines what is potentially one of the biggest scandals in the history of British education.

New to Stream

Special: Season 2, Netflix

By Netflix standards, season one of Ryan O'Connell’s semi-autobiographical coming-of-age tale came under the radar.

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The story follows the life of Ryan Hayes (played by O'Connell), a disabled gay man living in Los Angeles trying to make it as a writer.

Now semi-estranged from his mother, season two sees Ryan continue to explore the world on his own, with all the complex ups and downs life and love have to offer.

Ending Tonight

Taskmaster, 9.00pm, Channel 4

In this season's grand final, Charlotte Ritchie stumbles into some sand, Lee Mack dunks Little Alex Horne and Sarah Kendall stacks fish fingers.

Meanwhile, Jamali Maddix staggers around a bit and Mike Wozniak staggers absolutely everyone - again - all in a bid to secure the most coveted prize in television . . . Greg Davies' golden head nestled on a spike.

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