TV tonight: can ditching monogamy save these relationships?

Open House: The Great Sex Experiment

10pm, Channel 4
The eye-popping world show, successful which couples effort to unfastened their relationships, returns for a 3rd romp. Mark and Tanith wonderment if having enactment with different radical tin assistance physique spot – particularly aft 1 of them cheated. Then determination are puerility sweethearts Chloe and Paul, who person ne'er had enactment with anyone other … Hollie Richardson

Interior Design Masters with Alan Carr

8pm, BBC One
The crippled is connected arsenic the 5 remaining designers tackle their adjacent brief: a hospitality suite successful the location of English rugby, Allianz Stadium Twickenham. They person 2 days and £2,000 each to make thing incredible, with 1 country being transformed into an ode to women successful rugby. HR

Martin Clunes’ Islands of the Atlantic

9pm, ITV1
There’s much to Madeira than saccharine wine, arsenic Clunes discovers connected his Atlantic voyage. The land is besides location to high-speed rally racing and a forbidding statue of footballer Cristiano Ronaldo. Then it’s connected to the nine-island archipelago of the Azores, wherever the cuisine is positively volcanic. Ellen E Jones

Black Snow

9pm, BBC Two

Race against clip … Samara Kahlil (Megan Smart) successful Black Snow. Photograph: Brian Flexmore/BBC/Goalpost Television and All3Media International.

Julie (Kat Stewart) is nether scrutiny and Leo’s (Dan Spielman) cautiously constructed alibi begins to unravel similar inexpensive insubstantial insubstantial successful the bid finale. Meanwhile, a caller pb astir Samara’s (Megan Smart) mysterious caller forces Cormack (Travis Fimmel) into a contention against clip to support her, a devastating confession from Will (Josh McConville) sheds airy connected Zoe’s (Jana McKinnon) fate, and different twist threatens to upend everything. Ali Catterall

Hacks

9pm, Sky Max
They mightiness yet person got the late-night amusement disconnected the crushed – but astatine what cost? Without ever being excessively earnest, the razor-sharp drama proves its bosom arsenic stressed millennial writer Ava (Hannah Einbinder) burns out. Will boomer brag Deborah (Jean Smart) truly support rubbing brackish successful the wound? HR

Austin

9.30pm, BBC One
When Julian (Ben Miller) faces having 100,000 copies of his children’s publication pulped, helium plans to interruption into the warehouse with Austin (Michael Theo) to rescue them from being turned into babe wipes – adjacent if much than fractional of those pages conscionable accidental “splat”. Elsewhere, Ingrid (Sally Phillips) has a gathering with a fancy ghostwriter. AC

Film choice

Corpse successful the enactment … The Living Dead astatine Manchester Morgue. Photograph: Star Film Sa/FLAMINIA PRODUZIONI CINEMATOGRAFICHE/RGR Collection/Alamy

The Living Dead astatine Manchester Morgue (Jorge Grau, 1974), 10.10pm, Talking Pictures TV
This joyously tacky 1974 Spanish-Italian movie is simply a uncommon lawsuit of the continental zombie fearfulness genre popping up successful Britain. Filmed successful the Peak District, though it’s pretending to beryllium the Lakes, Jorge Grau’s chiller has corpses coming backmost to beingness acknowledgment to a Ministry of Agriculture bug-killing ultrasonic radiation experiment. There’s a pleasing clash of cultures amid the shuffling undead attacks, arsenic young people Edna (Cristina Galbó) and George (Ray Lovelock) combat prejudice from Arthur Kennedy’s dismissive aged Irish copper – arsenic good arsenic the flesh-eating hordes. Simon Wardell

Frank (Lenny Abrahamson, 2014), 2am, Film4
The irony of making the pleasing-on-the-eye Michael Fassbender deterioration a papier-mache caput for astir of the movie is lone 1 of the joys of this offbeat drama. Lenny Abrahamson’s comic communicative of philharmonic integrity is inspired by the beingness of Chris Sievey and his quality Frank Sidebottom. Domhnall Gleeson’s pianist, Jon, joins the charismatic singer’s avant garde psych-prog radical (to the disgust of Maggie Gyllenhaal’s synth player, Clara) and tries to nudge them towards popularity. But there’s a acheronian down Frank’s disguise that lends the caper a much superior face. SW

Live sport

Men’s cycling: Giro d’Italia, 1.45pm, TNT Sports 1. The year’s archetypal expansive circuit starts successful Albania, with Adam Yates 1 of the contenders.

Premiership rugby union: Leicester Tigers v Sale Sharks, 7pm, TNT Sports 1. At Welford Road stadium.