Episodes categorised as 'Drama' available now on BBC iPlayer

Left with her gruff grandpa in the Swiss Alps, young Heidi is determined to enjoy herself.

Peggy leads the breaking Mitchells in a final act of defiance against Archie.

Mars, 2059. Bowie Base One. Last recorded message: 'Don't drink the water. Not one drop.'.

Children's fantasy. Four WWII evacuees travel through a wardrobe to a magical wintry land.

An ill-tempered pilot and a magazine editor crash-land on a desert island.

Lucas and Ros make a final attempt to thwart Nightingale's sinister plan.

9/20. Lindsay takes the stand during her mother's trial, and Jo is nominated for an award.

A London bus takes a detour to an alien world, but can the Doctor defeat the Swarm?

5/5. The team receive images more intimate than anything they have previously dealt with.

It's Christmas in Shieldinch and Scarlett, Lydia and Gina receive unexpected visitors.

11/55. An old friend forces Linden to face his feelings of guilt over his wife's death.

When the Doctor meets another Doctor, the two must combine forces to stop the CyberKing.

3/5. Alan Bennett examines the delicate balance between writing and staring out of the window.

Archie's threats escalate, but Ronnie has graver concerns. Stacey makes a hard decision.

Supernatural horror in which a young couple move into a dream home with a newborn baby.

13/13. After landing on the surface of Venus, Zoe walks towards a sound only she can hear.

12/13. It's the day of the Venus landing, an event that will alter the lives of all involved.

Stacey and Bradley return but their happiness is threatened when Stacey uncovers a mystery

13/13. A backstage look at the explosive series finale of Merlin.

2/5. Alan Bennett explores the burden of shyness that haunted him for much of his adult life.

Stirring World War II drama about the crew of a British battleship.

Spanish horror. A couple get more than they bargained for when they go to look at a flat.

10/55. Judith's son is admitted with alcohol poisoning, and Holly mistakenly calls her ex-husband

1/2. Miss Matty becomes concerned about an isolated youngster as Mr Buxton returns to town.

1/5. Alan Bennett's descriptions of his parents' social aspirations are touching and humorous.

Archie surprises the Mitchells, while the Masoods battle their financial troubles.

9/13. As the Antares draws closer to Venus, the mysterious secret in Pod 4 is finally exposed.

11/13. The crew members of the Antares confront the loneliness and isolation of space.

10/13. The Antares crew is still coming to terms with the events that transformed the mission.

3/3. Back in the present day, Ben begins to discover that Geap Manor casts a long shadow.

12/13. When a woman is shot dead outside her restaurant, the Malmo police are called in to help.

Sci-fi thriller. An ex-cop is assigned to hunt down a gang of rebellious androids.

16/49. Ruth's plans for a family Christmas are shattered. May's joke on Lenny results in disaster

13/13. As Davros and the Daleks threaten the universe, the Doctor's companions join forces.

Oscar-winning western about a Union soldier who comes into contact with the Sioux Indians.

13/13. Will Arthur and Merlin find Balinor in time to save the kingdom?

2/12. Casey joins forces with Cappie and his Kappa Tau brothers to plan a prohibition party.

15/15. It's the night of the school Christmas party. Will Tommy and Rosa's secret be revealed?

14/15. Marla's got her family life back on track and is ready to share her dark secret with Jay.

2/3. In the 1920s, a costume ball and an engagement party lead back to a tragic wedding day.

12/13. A look at how the sequences with the devious dragon, played by John Hurt, were filmed.

The Masoods' financial troubles are over, but are other troubles afoot?

Section D discovers Hindu nationalists are planning an attack on the Muslim community.

8/20. It's D-day for Helen as the morning of her official teaching inspection arrives.

4/5. The team receive images predicting a robbery, a fire and multiple deaths.

12/13. Gaius fears that a sorcerer has revived the deadly Knights of Medhir.

13/15. There's a massive party brewing at school and everyone wants to know who's going with who.

Section D must recover a billion pounds from one of the world's most impenetrable banks.

7/20. A pupil claims she is being bullied, and Kim fears the girl gangs are back in full force.

3/5. Rebecca vows to stop a serial rapist from committing a violent attack and murder.

11/13. Ruthless warlock Alvarr attempts to reclaim the Crystal of Neahtid with help from Mordred.

12/15. Marla and Jay are back in town carrying a massive secret with them.

Section D is caught on the back foot when two CIA agents are found dead.

6/20. Christopher's relationship with a Year 12 girl is called into question.

2/5. Rebecca is determined to save a boy's life, but she learns of a second scheduled death.

10/13. King Alined wants war and is prepared to do anything to make it happen - even magic.

11/15. Marla and Jay run away to Brighton, closer to finding Amy. Fin and Stephen connect.

Lucas's former torturer Darshavin turns up with intelligence about a bomb in London.

5/20. Ruby's luxurious lifestyle crashes around her ears, and Max comes under scrutiny.

1/5. An astrophysicist claims to have received images of an explosion from the future.

9/13. Merlin helps the beautiful druid girl Freya escape from a bounty hunter's cage.

10/15. Marla reads her mum's diary, looking for clues about her sudden disappearance.

A secret meeting of powerful tycoons is stormed by terrorists.

4/20. Luke has a day from hell when the pupils find out about his family life.

8/13. A mysterious warrior challenging Arthur to a duel starts a devastating chain of events.

9/15. The girls are thrown into disarray by the arrival of a cute blonde stranger.

The country reaches crisis point when energy supplies are threatened by an explosion.

3/20. Danielle and Aleesha stagger into school still drunk from the night before.

7/13. Determined to rid Camelot of magic, Uther summons the most feared witchfinder in the land.

8/15. Marla and Jay get closer when they take a road trip. An inspection looms over the café.

With Harry still missing, there is one question on everyone's mind: Is he dead, or alive?

2/20. Ex John Fosters pupil Amy accuses Bolton of attempted rape.

6/13. As Queen Catrina's true troll nature surfaces, her influence over Uther increases.

7/15. Jay gambles with everyone's future, and Stephen still can't chose between Olive and Rosa.

1/20. War breaks out in the playground after an influx of middle-class pupils at Waterloo Road.

5/13. Uther is captivated by the beautiful Lady Catrina, who Merlin suspects to be a troll.

6/15. Toni collapses and Olive needs everyone's help to keep the café going.

5/15. Can Stephen stay friends with Olive now they are officially over?

4/13. Gwen is mistaken for Morgana and kidnapped. Arthur heads out to fight for her freedom.

4/15. Stephen and Olive want to escape to romantic Paris, but will it ever actually happen?

3/13. Morgana becomes terrified that she has magical powers. Merlin knows she needs the truth.

3/15. Jay waves goodbye to The Cut, but Marla is gutted to lose him as they were getting close.

2/13. Merlin helps Arthur disguise his identity to enter a jousting tournament.

1/13. New servant Cedric muscles in on Merlin's position as Arthur's right-hand man.