This article is not part of the Holby universe.
This article covers a subject that is part of the real world, and thus should not be taken as a part of the Holby universe.
This episode is currently available on BBC iPlayer.
If you are a UK resident with a TV licence, you can watch this episode here.
"Hubble Bubble" is the 999th episode of Holby City and the 44th episode of the 21st series. It was preceded by "Promise" and followed by "Remember, Remember". The episode was directed by Tracey Rooney and written by Joe Ainsworth.
- Catherine Russell as Serena Campbell
- Nic Jackman as Cameron Dunn
- Alex Walkinshaw as Adrian "Fletch" Fletcher
- Lee Mead as Ben "Lofty" Chiltern
- Belinda Owusu as Nicky McKendrick
- Bob Barrett as Sacha Levy
- Kaye Wragg as Essie Di Lucca
- David Ames as Dominic Copeland
- Jaye Jacobs as Donna Jackson
- Ramin Karimloo as Kian Madani
- Rosie Marcel as Jac Naylor
- Jack Ryder as Evan Crowhurst
- Verity Marshall as Helen Pidge
- Rosalind Halstead as Beatrice "Bea" Kaminski
- Ben Fox as Ged Lees
- Emily Bowker as Stacey Clarkson
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