Paul O’Grady: For The Love Of Dogs (ITV, 8.30pm)

YOU never know quite where you are with Paul O'Grady. One minute he’s sounding off on his BBC Radio 2 show on Sundays about his batty listeners or being rude about guests on the TV chat shows, the next he’s determined to find homes for abandoned, and often ill-treated, dogs at Battersea Dogs and Cats Home.

Since 2012, the 59-year-old who is both Savage by name and nature has been beguiled by a host of forlorn pets, many of which he’s tried to sneak away to become part of his ever-burgeoning pack of four-legged friends.

O'Grady often talks to the dogs he meets at Battersea, too, and confesses he cringed watching footage from For The Love Dogs. "I thought, 'When did I turn into Catherine Tate's comedy character Nan?' I go in the kennels going, 'How are you sweetheart?' I've never called anyone sweetheart! So I realise I go completely soft."

The soft-touch might explain why the sheep on his farm have almost reached double-figures.

"I say no more and then someone turns up with an orphan lamb and I think, 'The farmers don't have time to bottle feed a lamb every two hours, so I'll take it' and the next thing you've bonded. But it's impossible not to bond with a lamb," he insists, particularly when you're integral to their safe arrival.

"I didn't even know one of our sheep was pregnant and heard her kicking off in the barn. I went in and there's a leg sticking out."

After removing his "nice sweater" and telling himself to get a grip, O'Grady successfully delivered the breech lamb. "I walked out the barn like I'd been reborn. There should've been music behind me," he laughs.

What does he think the secret of his series is?

"Because it's a feel good show. It's like Long Lost Family, you might start off with a terribly sad story but then it finishes with a happy ending. I've learnt now from talking to the viewers and what they say to me, they like my relationship with the dogs and the animals. They like the fact that I'm very hands on. I don't sit there and say, 'This is a poodle', I'm lying on the floor with the poodle probably on top of me. But it's a feel good thing, it makes you laugh, it makes you cry. It's that sort of thing we all like."

This week he meets a bulldog who's about to undergo an operation to correct a cherry eye, before seeing how a shih-tzu with wobbly back legs can be helped with physiotherapy – including plenty of walks.

There's also a lurcher in Old Windsor whose skin condition is so infectious that it must be kept in quarantine - the poor neglected pooch has contracted sarcoptic mange, which means staff have to be extra careful when administering treatment.

Who Do You Think You Are? (BBC1, 9pm)

THE go-getting 79-year-old Mary Berry, with a string of successful shows to her name, now joins the TV heritage hunters to seek earlier generations on her family tree, beginning in Bath where she was born, and travelling on to Norfolk, where both her grandparents lived in Norwich. Looking back even further, she uncovers the stories of ancestors including a bankrupt book-binder, a self-motivated corset-maker and a third who worked in a much more familiar profession.

Operation Stonehenge: What Lies Beneath (BBC2, 8pm)

REVOLUTIONARY research has just been undertaken which, over the course of just a few years, has yielded some fascinating insights into the Stonehenge site. Drawing on this new data, historians might finally be able to put to bed some of its mysteries, as this two-part programme reveals the five-year project's findings. Clues come from the bones of giant aurochs and curiously-tinted flints which might show why the site has such spiritual significance.