entertainment / Saturday, 23-Aug-2025

For All Mankind Spinoff Casts 3 More Key Roles With Character Details Revealed

The For All Mankind spinoff Star City has cast three more stars. The upcoming Apple TV+ show will follow the Soviet Union's perspective on the original show's alternate history Space Race drama, taking place in the titular Star City, which is a research facility that is the training ground for Soviet cosmonauts. The For All Mankind spinoff, which was created by the flagship series' Ronald D. Moore, Matt Wolpert, Ben Nedivi, is already set to star Rhys Ifans, Alice Englert, Solly McLeod, Anna Maxwell Martin, and Agnes O’Casey.

Per Variety, Star City has rounded out its main cast with Adam Nagaitis, Josef Davies, and Ruby Ashbourne Serkis, who will be playing Valya, Sergei, and Tanya respectively. Valya is a cosmonaut with the Soviet Space Program who is described as "highly respected," Sergei is a "brilliant" Soviet Ground Control engineer, and Tanya is the wife of a cosmonaut who feels claustrophobic in the isolated and secretive world of Star City. It is unclear who Tanya's husband is as of the time of writing.

What This Means For Star City

The Spinoff’s New Stars Have Ample Experience

A closeup of Ruby Ashbourne Serkis as Celia Wilson in The Serpent on Netflix
A closeup of Ruby Ashbourne Serkis as Celia Wilson in The Serpent on Netflix

Of the three up-and-coming stars joining the Star City cast, only one has major experience in the sci-fi genre. That would be Josef Davies, who joined the Andor cast as imperial prisoner Xaul in three episodes of the Disney+ Star Wars spinoff series. However, all three have ample experience in episodic television in general, including Davies, who has previously starred in Young Wallander, The Walk-In, and The Hunt for Raoul Moat, in addition to appearing in episodes of Call the Midwife, Chernobyl, and The Crown.

Ruby Ashbourne Serkis... is the daughter of acclaimed mo-cap actor and director Andy Serkis.

For instance, Adam Nagaitis has had multi-episode runs on quite a few notable series, including the horror drama The Terror, the Walking Dead spinoff Daryl Dixon, and HBO’s Chernobyl, though he did not appear in the episode of the latter series in which Davies also starred. Additionally, Ruby Ashbourne Serkis, who is the daughter of acclaimed mo-cap actor and director Andy Serkis, has held roles in The Letter for the King, Becoming Elizabeth, and Shardlake. With so many titles under their collective belts, the new cast members should have ample experience helping them fit in with the Star City ensemble.

Our Take On The New Star City Characters

The Show Explores Every Level Of The Community

A closeup of Adam Nagaitis as Quinn in The Walking Dead Daryl Dixon
A closeup of Adam Nagaitis as Quinn in The Walking Dead Daryl Dixon

From the character descriptions revealed in this Star Citycasting update, it seems that the show will follow a similar format to For All Mankind. This includes exploring every level on which a person can be involved in the space program, from those who are right in the middle to those who are on the periphery and are kept frustratingly in the dark. It seems that changing the focus of the show to the Soviet Union has not altered this overall approach to the television franchise's storytelling.

Source: Variety

A group of astronauts looking out into space in For All Mankind.
A group of astronauts looking out into space in For All Mankind.
Scene from For All Mankind, from which Star City is a spin-off
Star City
Sci-Fi
Drama
Showrunner
Ben Nedivi, Matt Wolpert

Creator(s)
Ben Nedivi, Matt Wolpert, Ronald D. Moore

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