For anyone who is slightly uncomfortable with animals or the way they are treated in captivity, Louis Theroux's America's Most Dangerous Pets on BBC Two made for uncomfortable viewing.
Theroux managed to tackle the issues surrounding animal captivity in the US in his own unique, compulsive way.
The programme focused on owners of tigers, chimps and pretty much any other animals which are pets - but probably shouldn't be.
If success is measured in Twitter trending topics then Theroux will be pleased to know #louistheroux topped the social media site throughout Sunday night.
"I especially enjoyed his encounter with a baboon called Tatiana, who seems to take quite a fancy to him," wrote Sam Wollaston in The Guardian.
"She wraps herself around him, and grooms him, picking something (ticks?) off his chest and head. Theroux doesn't seem totally relaxed. "I don't really want to touch her bum," he says, shyly. Oh don't be so uptight and British, Louis.
But Metro wasn't as impressed.
"Unfortunately, the characters he met weren't quite as bonkers as we - and Louis - had hoped they would be" before it concluded: "This was a disappointing offering from Theroux. The only way he can redeem himself now is by telling us all where he found the elixir of life."
Meanwhile, The Daily Telegraph was struck by the sadness that ran through programme.
"Most of the owners looked no happier than their locked-up animals," wrote Harry Wallop.
Wallop praises Theroux's performance: "His attempt to conduct a straight interview while the red-bottomed monkey sat atop his head pulling his hair was television gold."
But finished on a failing: "What he failed to get to the bottom of was the far more fascinating habitats and breeding lives of their owners."