Anna Fitch

After losing her friend Yo, Anna builds a detailed 1/3-scale version of her friend's house. It is just big enough for Anna to squeeze into, and inside lives a puppet of Yo. When the pair first met, Yo was 73 and Anna 24.

Survivors presents an intimate portrait of Sierra Leone during the Ebola outbreak, exposing the complexity of the epidemic and the sociopolitical turmoil that lies in its wake.

A professor develops an extraordinary relationship with an octopus when he invites it to live in his home. The octopus, called Heidi, unravels puzzles, recognises individual humans and even watches TV with the family. The episode also shows remarkable behaviour from around the world - from the day octopus, which can change colour and texture in a split second, to the coconut octopus, which carries around its own coconut shell to hide in. But most fascinating of all is seeing how Professor David Scheel and his daughter Laurel bond with an animal that has nine brains, three hearts and blue blood running through its veins.

The Genius of Marian follows Pam White in the early stages of Alzheimer's disease. Her son, the film maker, works with her as she attempts to write a book that tributes her mother, the artist Marian Steele.