The 5 best shows on TV tonight: Wednesday 16 June
A Horizon Special goes behind the scenes on the development of a coronavirus vaccine.
It follows teams across the globe who got to work last year to help find a vaccine for COVID-19.
It's the last hurrah for the Sewing Bee this evening too as the finale of the season airs, but only one of the three finalists can be named winner.
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Plus, Emilia Fox helps to investigate another unsolved murder case on Channel 4.
Inside Tesco: 24/7 - 7pm - Channel 5
A new documentary takes a deep dive into the operations of Britain's biggest supermarket retailer.
It looks at how they managed to weather the storm during the pandemic amid high demand and difficult circumstances.
The Great British Sewing Bee - 9pm - BBC One
It's needles at the ready for one last time for the remaining three sewers before one of them is named the winner of this year's Sewing Bee.
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Serena, Rebecca and Raph start off by making little girl's bridesmaid dresses complete with complex elements.
Judges Esme Young and Patrick Grant also tasked them with transforming homeware items in festival fashion before they construct glamorous off-the-shoulder evening gowns in the final Made to Measure.
Horizon Special: The Vaccine - 9pm - BBC Two
The UK's vaccination rollout is still underway with well over half of the population now having received one dose, but how did it even become a posssibility?
This special looks at the scientists who took on one of the greatest medical challenges of modern times by developing vaccines to fight COVID-19.
It focuses on five vaccine teams across the globe with the inside story of their quest to develop a successful vaccine.
Before We Die - 9pm - Channel 4
The drama gets into the latter half of the series with Bianca (Issy Knopfler) discovering really happened to Stefan (Petar Cvirn).
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Meanwhile, Christian (Patrick Gibson) decides to take a trip with Davor (Alexej Manvelov) to reveal what he needs to know about the planned operation.
In the Footsteps of Killers - 10pm - Channel 4
Emilia Fox and criminologist Professor David Wilson investigate the disappearance of Suzy Lamplugh this time.
The estate agent disappeared in 1986 but no one has ever been charged with her abduction and murder.
The pair manage to narrow down the suspects to one man after delving into the evidence.
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