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Luther takes a leave of absence from the police; when an old colleague brings him a shocking piece of news, he is drawn into investigating the crimes of a gruesome killer.

Sagrada Familia; what is happening on Casa Mila's rooftop; where Columbus met the king and queen of Spain after returning from the Americas; Bishop's Bridge in the Gothic Quarter; 1888 World Expo.

What happens to sea turtle hatchlings after they emerge from their nests.

A workout focusing on the back, core and knees helping to relieve any pain or discomfort.

A fun workout with novelty music and choreography.

Beginning a pose from the back body helps integrate the strength of the front body; Snowbird and Boat poses.

Baffling bottle noises and perfect pitches with a pipe-a-phone; exploring the sound of science; making a straw panpipe; neuroscientist Liz McCullagh.

Getting a credit card and using it correctly; understanding terms like credit score and APR.

Someone steals professor Precipito's experiments; Dark Truder steals a glacier, intent on carving it into a sculpture of himself.

Cleansing the sinuses with warm water and salt.

Stretches for the whole body help to release tension in the hips, hamstrings, spine and more.

Aligning and strengthening the hips and feet to improve balance; strengthening the core and hips to improve balance and posture.

New abdominal exercise; new balance challenge.

Skillet pizza Margherita; traditional and enameled cast iron skillets; chocolate chip skillet cookie.

Exploring the historical points associated with the cities Poznan and Gniezno, and sampling the flavors associated with the most ancient part of Polish history.

Buffalo broccoli with blue cheese drizzle; Cajun hobo packs; mystery box challenge -- mushrooms.

Chickpea and chestnut soup; peach, hazelnut, tomato and arugula salad; pain d'epices.

Romanian creme fraiche cake; a new spin on apple pie -- Romanian apple pie with cinnamon and walnuts; meringue-topped cake wtih cherries.

An old home sits on a cliff, surrounded by foliage and a gentle waterfall.

Using oil glazes over an acrylic underpainting to create a crisp, snowy woodland scene.

The arrival of warmer weather brings the arrival of baby chicks on the farm.

Simple changes can conserve water and make a big difference around the home.

Jewish-style potato latkes; kimchi jjigae.

Diamonds and y seams.

Dark Truder traps the Zula Patrol on an inflatable planet; Dark Truder's machine puts the patrollers in super-slow motion.

Dev needs to stay organized as a laundromat manager to clean the team jerseys; Rae creates an easier way for the Beeples to get to the top of Mount Froyo.

The Maker movement and craft beer in Portland, Ore.; Historic Carousel & Museum in Albany, Ore.; an ATV excursion through Deschutes National Forest; cattle ranching; making cowboy boots in Pendleton, Ore.; Tamástslikt Cultural Institute.

The Mentors help a young entrepreneur chart a path for the future business he wants to build.

Exploring long-term care insurance; how to give children an allowance; the complexities of Medicaid planning.

Creating an efficient home on the front range of the Rockies; a company that turns yard waste and tree debris into garden mulch for the retail market; a company makes new glass out of bottles from a landfill.

South Haven Lighthouse in Michigan; Friends Good Will tall ship; Michigan Maritime Museum.

Explore the many water-related recreational opportunities in the central Florida.

Harry asks Alexa to investigate the case of his friend, who is accused of murdering a survival expert.

Chief Superintendent Foyle discovers an international cover-up which could threaten the British government.

The sleepy Saskatchewan town of Dog River is in the middle of nowhere, and the residents like it that way just fine. Brent's the guy who owns the only gas station around, and it happens to be attached to the only coffee shop. Police officers Davis and Karen are always on the prowl in this little nook of a prairie town.

Exploring Belize, the country that straddles the worlds of Central America and the Caribbean; adventures include an archaeology dig at a Mayan temple, fishing near the Great Blue Hole, making chocolate and feeding a jaguar.

Harry asks Alexa to investigate the case of his friend, who is accused of murdering a survival expert.

Chief Superintendent Foyle discovers an international cover-up which could threaten the British government.

The sleepy Saskatchewan town of Dog River is in the middle of nowhere, and the residents like it that way just fine. Brent's the guy who owns the only gas station around, and it happens to be attached to the only coffee shop. Police officers Davis and Karen are always on the prowl in this little nook of a prairie town.

Exploring Belize, the country that straddles the worlds of Central America and the Caribbean; adventures include an archaeology dig at a Mayan temple, fishing near the Great Blue Hole, making chocolate and feeding a jaguar.

Sweet potatoes as the secret ingredient in award-winning vodka in California; Iowa farmers make a special kind of wine; a sweet salad featuring candied oranges; "sassy cows" create special kinds of cheese and ice cream.

A visit to Lisbon, Portugal, features cod, hot pastries, a stroll of the city's back lanes and fado music; exploring castles of Portuguese royalty in Sintra.

Relieving tension in the lower back with posture and hip isolation exercises.

The reverse arrow position designed to restore energy and improve circulation; toning the spine.

Animal sounds; zoos; what animals eat; Wimee and friends sing about seeing all kinds of animals at the zoo.

Opportunities for making money.

Dark Truder builds a giant robot to help him conquer the galaxy; Deliria blocks the Zula Patrol's space telescope.

A gentle total body stretch includes seated sun salutations along with easy to follow yoga moves to stretch and lengthen the body.

Stretching to strengthen abs, tone the waist and increase flexibility in the legs, hips and spine.

Being aware of the body's movements and how it helps coordination and reaction time.

Chefs Maria Loi and Asterios Koustoudis prepare Mediterranean classics with a twist, including eggplant salad and spinach rice; eggplant boats; spinach and rice soup.

Green curry and coconut creamed collards; collard salad with bacon dressing; exploring a range of collard varieties; collard sandwiches.

Chickpea-tomato salad with tofu feta; escarole with Kalamata olives; garlic hummus; vegan lemon buttermilk cake.

Distiller Dave Weglarz of StilL 630 hand-crafts Missouri bourbon, rum, brandy and unique botanical-forward gins.

Fish with plums, pasilla and tequila; orange blossom rice with pepitas; chardonnay mango pecan tart.

A rustic field house, soft trees and winding pathway.

The regional traditions surrounding cherries in Michigan; harvesting sweet and tart cherries at a cherry farm; the country's largest cherry festival; making a cold cherry soup; a roadside cherry mecca.

The three teams continue to refine their designs and create new prototypes; the mentors weigh in on the designs and prototypes.

The Clemson Experimental Forest contains more than 17,000 acres of woodland and pastoral agricultural land.

Horticulture expert Dr. Chris Cooper and other experts share their garden wisdom and answer e-mails and letters about lawn and gardens.

Making a spoon.

Dark Truder tricks the Zula Patrol into going to Earth for a vacation; Pluto refuses to orbit when the other planets hurt his feelings.

Putting money in a safe place; avoiding identity theft; Washington State Attorney General Rob McKenna.

Staying entertained on a rainy day; off-the-grid RVing; authors Marc and Julie Bennett.

Hiking Colorado's Rocky Mountains; horseback riding in the wilderness; a fire ritual.

CPA Tom Corley talks about the habits of the rich and how they spend their money; good spending strategies; three retirement mistakes.

Upgrades to the deep-sea submersible Alvin will take it deeper than ever before, allowing Alvin to continue its revolutionary scientific work.

Interviews with world leaders and newsmakers.

Johns Hopkins University professor Hahrie Han.

When Ryan discovers what has really been going on in his brother's seemingly happy marriage, he's forced to make a momentous decision about his own relationship with Niamh.

Doc Martin's medical career is still under scrutiny because of his pre-existing blood phobia, and he has to pass three new courses; Louisa focuses on her new career.

Oakley Wines enjoys newfound fame and welcomes a surprise visitor, while gala preparations take an explosive turn, putting the entire showcase at risk.

Music includes Mozart's Horn Quintet, Debussy, Fauré and Mendelssohn Octet.

When Ryan discovers what has really been going on in his brother's seemingly happy marriage, he's forced to make a momentous decision about his own relationship with Niamh.