Cycling: Track World Championships (BBC2, 3.15pm)

World titles and a ticket to the Tokyo Olympics are the twin goals for the cyclists at the Velodrom in Berlin, with Jill Douglas and Sir Chris Hoy looking back at the first three days. Team GB’s Jason and Laura Kenny are in action as they continue preparations for a defence of their Olympic titles. Jason is expected to contest the keirin and team sprint in Berlin, while his wife Laura targets the omnium and team pursuit. Elinor Barker, who won the only British gold at last year’s championships in the scratch race, is also likely to feature. Simon Brotherton and Chris Boardman provide the commentary.

Building the Billion Pound Mega Bridge (C5, 7pm)

An awe-inspiring insight into the construction of Montreal’s new Samuel de Champlain Bridge, which carries eight lanes of traffic across the St Lawrence River and Saint Lawrence Seaway for more than two miles. It’s designed to carry a million vehicles a week and survive extreme temperature fluctuations. Here, chief engineer Gary Maiholt and his team race to complete the bridge in time for its opening. With three months to go, the pressure is on – the concrete must be poured to perfection, every steel bolt has to be tight, and all the cables holding the bridge up have to be tensioned. Their work also involves making sure innovative design features – such as drainage flushes that protects the construction from salt water corrosion – are applied correctly.

Ant & Dec’s Saturday Night Takeaway (STV, 7pm)

The popular duo’s entertainment show, featuring undercover pranks, surprises galore and star guests. In this week’s show, Ant and Dec are joined in the studio by Rob Brydon, who takes up the role of Star Guest Announcer, while Anne-Marie will be taking to the stage to perform in the End Of The Show Show. Plus, lucky viewers across the UK are surprised with a Place On The Plane and another audience member gets the chance to Win The Ads, and get their hands on every single item featured in the commercial breaks.

Catchpoint Sport Relief Special (BBC1, 8.30pm)

Now that the axe has fallen on Take Me Out, Paddy McGuinness’s Saturday evenings are free, allowing him to return for the second series of this multi-tasking game show. If you missed its debut last year, the format is simple – two teams of two compete for a cash prize. To win, they must correctly answer a variety of general knowledge questions while trying to catch balls falling from the ceiling. Ahead of the regular run, McGuinness is hosting two Sport Relief specials featuring celebrity teams. The first sees comedian Susan Calman and Strictly Come Dancing professional Johannes Radebe go head-to-head with with netball player Eboni Usoro Brown and stand-up Darren Herriott. Next week, ex-cricket Graeme Swan and actor Rachel Parris lock horns with Olympian Sam Quek and comic Mark Watson.

Casualty (BBC1, 9.10pm)

Faith and Lev prepare for Luka’s surgery and the Emergency Department rally around to show their support for the family. Meanwhile, Zsa Zsa (Sharon Gless), who has flown in for the operation, interrogates Dylan on the lengths he has gone to in supporting Faith. The team is shocked when Charlie returns to work earlier than expected, despite Duffy’s death. He throws himself into work as a distraction from his grief, but soon becomes agitated when he realises a few things in the ED have changed in his absence. Marty arrives at work hungover and arranges a hook-up for his lunch break but is crushed when it leads to yet another rejection.