TV tonight: it’s everyone’s favourite sheep-herding family

Yorkshire shepherd Amanda Owen takes an old-school camping trip. Plus: a documentary for Agatha Christie fans. Here’s what to watch this evening 8pm, Channel 4When faced with freshly plastered walls, what creative kid could resist adding a couple of little scratchy doodles? After discovering that her girls have already started leaving their marks, Yorkshire shepherd Amanda Owen wisely packs some marshmallows and whisks them all off for an old-school camping trip to Boggle Hole. While the ongoing farmhouse conversion dries out, it’s left to her ex-husband Clive and their son Miles to make the grounds look less like a building site. Graeme Virtue 7.50pm, PBS AmericaFor many people, the stories of Agatha Christie epitomise a particular version of England. This documentary retraces the lifelong journey the author took through the country and speaks to family members as it explores key places including Torquay, Timperley and rural Oxfordshire. How did they feed into her writing? Phil Harrison 9pm, BBC FourSome summer tips for your verdant outdoor areas: this time, Adam Frost is bringing his new space to life by planting shrubs, building a path and creating a potted herb garden. Mean