Years have passed since the Three Musketeers, Aramis, Athos and Porthos, have fought together with their friend, D'Artagnan. But with the tyrannical King Louis using his power to wreak havoc in the kingdom while his twin brother, Philippe, remains imprisoned, the Musketeers reunite to abduct Louis and replace him with Philippe.

King Louis XIV has without his knowledge a twin brother, Philippe, but when he is told, he immediately locks up his brother in the Bastille. The king wants to increase his popularity and stages an assassination against himself where Philippe is dressed as king Louis. But Philippe manages to escape the assassination and everybody believes him to be the real king...

A race of giant Gastropods has taken over the planet Jaconda. Their leader, Mestor, now intends to cause an enormous explosion in order to spread his people's eggs throughout the galaxy, and he kidnaps juvenile twin geniuses from Earth to work out the necessary mathematical equations. Space fighters led by Lieutenant Hugo Lang are dispatched to get the twins back, but they come under attack and Lang is the sole survivor when his ship crashes on the asteroid Titan III. A newly regenerated Doctor and Peri become involved and help Jaconda's elderly former ruler Professor Edgeworth, who is really a Time Lord named Azmael, to defeat Mestor and free the planet's bird-like indigenous people from the gastropods' reign of terror. Azmael, however, sacrifices his life in the process.

Two babies are switched at birth. When the mistake is discovered 12 years later, it leads to complications in the lives of both families. One family is affluent, with dutiful and (apparently) contented children. The other family is poor, with rambunctious (even delinquent) children, often hungry, but with lots of laughter in the house.

June and Jennifer Gibbons are twins from the only Black family in a small town in Wales in the 1970s and '80s. Feeling isolated from the community, the pair turn inward and reject communication with everyone but each other, retreating into their own fantasy world of inspiration and adolescent desires. After a spree of vandalism, the girls are sentenced to Broadmoor, an infamous psychiatric hospital, where they face the choice to separate and survive or die together.

Thirteen year old Sam Cleary suspects that his mysteriously reclusive neighbor Mr. Smith is actually the legendary vigilante Samaritan, who was reported dead 25 years ago. With crime on the rise and the city on the brink of chaos, Sam makes it his mission to coax his neighbor out of hiding to save the city from ruin.

Widowed Welsh mother Anna Leonowens becomes a governess and English tutor to the wives and many children of the stubborn King Mongkut of Siam. Anna and the King have a clash of personalities as she works to teach the royal family about the English language, customs and etiquette, and rushes to prepare a party for a group of European diplomats who must change their opinions about the King.

When twin brothers arrive home to find their mother’s demeanor altered and face covered in surgical bandages, they begin to suspect the woman beneath the gauze might not be their mother.

Two identical twin sisters, separated at birth by their parents' divorce, are reunited years later at a summer camp, where they scheme to bring their parents back together. The girls, one of whom has been living with their mother and the other with their father, switch places after camp and go to work on their plan, the first objective being to scare off a gold-digger pursuing their father.

Identical twins are separated at birth, one becoming a streetwise mechanic, and the other an acclaimed classical concert conductor. Finally meeting in adulthood, they're mistaken for the other and entangled in each other's worlds.

Olivia and Matthew Grey, 18-year-old twins born into a world of privilege and high expectations. There are almost no boundaries between them - even their dreams are connected.

Filmmaker Stephen Hosier takes a journey with Richard Csanyi, his childhood friend, as he investigates the life and death of his twin brother Attila, who was found dead on a rooftop in 2020.