TV tonight: five sisters fight for justice after a shocking murder in Belfast

A family continues its search for answers following a devastating killing. Plus: Hannah Fry investigates the future of superintelligence. Here’s what to watch this evening

Murder in Belfast: Sisters Seeking Justice

9pm, BBC Two In 2005, Robert McCartney was beaten up and stabbed to death in a gang attack outside a Belfast city pub. After that, witnesses (there were about 70) remained silent and evidence was destroyed. But Robert’s five sisters and fiancee continued their fight for answers – including finding out what happened to a survivor of the attack. This documentary follows their journey. Hollie Richardson

The Future With Hannah Fry

30pm, BBC Two She was a rubbish celebrity traitor, but Prof Hannah Fry is back doing what she does best: digging into the big facts, this time about the future of superintelligence.