When a Yeti is captured by the Detsen monks, the Doctor discovers that it is a robot � but its control sphere is missing. Elsewhere in the monastery, the sphere is on the move.

Still reeling from their first encounter, can the Doctor and her new friends survive a hostile alien environment to solve the mystery of Desolation?

Daniel Roche is an English child actor, best known for playing Ben Brockman in the BBC One sitcom Outnumbered between 2007 and 2014.

3rd Assistant Director on Time Crash (Children in Need)

Gerard Murphy was an Irish film, television and theatre actor.

He played Richard in the 1988 story Silver Nemesis

Murphy began his career on stage with the Glasgow Citizens Theatre. He branched out into television work with roles in Z Cars, Heartbeat, Father Ted, and The Bill. He narrated the BBC Radio version of Tolkien's The Lord of the Rings. 

He portrayed Hector in Alan Bennett's The History Boys in a national tour co-produced by the West Yorkshire Playhouse and Theatre Royal Bath.

Perhaps his best-known film roles are as pirate and spy "The Nord" in Waterworld, and as the corrupt High Court Judge Faden in Batman Begins.

He died in 2013 after a battle against prostate cancer.

Katy Manning is a British actress best known for her part as the companion Jo Grant alongside Third Doctor Jon Pertwee in the early Seventies.

She has also provided the voice for Iris Wildthyme in several of the Big Finish Productions audio dramas.

Manning's father was sports columnist J. L. Manning O.B.E. One of her childhood friends was Liza Minnelli, whom she met while they were both at boarding school together. She trained at the Webber Douglas Academy of Dramatic Art, before joining a Wolverhampton repertory company, where she made her debut in Man At The Top (1970).

She played the part of Jo Grant from 1971 to 1973, and Manning struck up an immediate rapport with her co-stars, Pertwee, Nicholas Courtney (The Brigadier), John Levene (Sergeant Benton), Richard Franklin (Captain Mike Yates), and Roger Delgado (the Master). Fans of Doctor Who often refer to these characters as the UNIT family. 

After leaving the series she famously appeared naked in an adult magazine, posing with a Dalek.

In October 2010 Manning appeared in the fourth series of Doctor Who spin-off The Sarah Jane Adventures with Matt Smith as the Eleventh Doctor. The two-part story, entitled 'Death of the Doctor', was written by former executive producer of the programme Russell T Davies.

Katy Manning wrote the TV series Private Wives and has been involved in other writing and directing projects. In 1980, she toured in Peter Terson's 'VE Night' alongside Ian Cullen and Jane Goddard. In Australia she appeared in the play Run For Your Wife (1987-1988), and the production toured the country. Other members of the cast in the production were Jack Smethurst, David McCallum, and Eric Sykes. She has also appeared in the low-budget film noir When Darkness Falls.

In June and July, 2007, she appeared as Yvette in the stage show 'Allo 'Allo alongside Gorden Kaye as Rene Artois at Twelfth Night Theatre in Brisbane. Guy Siner and Sue Hodge also reprised their original roles from the television series, and the other characters were portrayed by famous Australian television actors including Steven Tandy and Jason Gann.

In 2009 Manning returned to the UK as part of her one-woman show Me and Jezebel. The play is based on a true 1985 story about Bette Davis inviting herself to a fan's house for a night and staying for a month, with Manning playing all the parts. It toured through March and April in England and also played at the 2009 Edinburgh Fringe at the Gilded Balloon Wine Bar in August. The show received a five-star review in the Edinburgh Evening News, which described Manning as "one of Britain's best actresses". 

Shaun Sutton joined the BBC Drama department in 1952 where he carved an early career in writing and directing, especially with productions aimed at children. By the 1960s he had moved onto adult drama, being one of the early directors for the successful police series Z-Cars and follow-up series Softly, Softly. In 1963, Sydney Newman offered him the position of producer on a developing series called Doctor Who, but he declined this to focus on his other projects. In 1966 he accepted the position of Head of Serials, succeeding Gerald Savory, and then a year later took over from Newman as temporary Head of Drama, which became permanent in 1969.

He occupied this position throughout the 1970s, a period which is often now referred to as the 'golden age' of drama, with productions such as The Forsyte Saga, I Claudius, The Onedin Line, Poldark, The Six Wives of Henry VIII to name but a few. He also oversaw the casting of three Doctors, Jon Pertwee, Tom Baker and Peter Davison.

In 1981 he resigned from the position to return to producing, including some thirteen of The Complete Dramatic Works of William Shakespeare. His last work was Merlin of the Crystal Cave in 1991.

In 1982 he published The Largest Theatre in the World, an autobiography of his time working in the drama department of the BBC.

He was married to Barbara Leslie and the father of four children, and after retirement lived in Norfolk.

He was made an OBE in 1979.

Actor from Sydney, New South Wales, Australia

He appeared in the 1967 story Enemy of the World.

He appeared in many televison programmes during the 60's and 70's

Lawrence Davidson  had an uncredited role as the Draconian First Secretary in the 1973  Doctor Who story Frontier in Space.

Also worked on The Young Indiana Jones Chronicles, Bergerac, Harry Enfield's Television, Strike It Rich, Lytton's Diary, Agatha Christie's Partners in Crime, Curse of the Pink Panther, The Brack Report, The Dogs of War, Escape, Spearhead, Crown Court, BBC Play of the Month, Victorian Scandals, Man About the House, Oil Strike North, Churchill's People, Masquerade, New Scotland Yard, Colditz, The Dragon's Opponent, The Song of Songs, Man Who Was Hunting Himself, The Saint, Who Was Maddox?, The Edgar Wallace Mystery Theatre, Sergeant Cork, No Hiding Place, Sir Francis Drake, Danger Man, Pride and Prejudice

Mary Morris was a British actress.

She appeared  in Doctor Who in 1982 in the story Kinda, playing the shaman Panna opposite Peter Davison.  

She was the daughter of Herbert Stanley Morris, the botanist, and his wife Sylvia Ena de Creft-Harford. She was educated at the Royal Academy of Dramatic Art.

She made her stage debut in Lysistrata at the Gate Theatre, London, in 1935. In 1943, she played Anna Petrovitch in the Ealing war movieUndercover as the wife of a Serbian guerrilla leader. She played Professor Madeleine Dawnay in the science-fiction television drama A for Andromeda (and its sequel, The Andromeda Breakthrough), and the female Number Two in the episode Dance of the Dead of the TV seriesThe Prisoner (1967).

Other television appearances included the Countess Vronsky in Anna Karenina (1977, PBS), the macabre, ancient relative in the Walter De La Mare story Seaton's Aunt (1983, PBS) and the formidable matriarch in Police at the Funeral ( 1989, PBS).

She played Peter Pan on two occasions: once on the stage (as a Gypsy boy) and once as Number Two dressing up as him at a masquerade ball.

She died from heart failure in Aigle, Switzerland.

Biography from the Wikipedia article, licensed under CC-BY-SA