Lost in Space (TV) Cast
The cast of Lost in Space. Updated on September 15, 2025.
39 actors
Toby Stephens
as John Robinson (28 episodes)

Toby Stephens brings John Robinson to life, the father of the Robinson family. John is a former Navy SEAL and an astute strategist. He is a caring father who is determined to lead his family through the challenges they face in their journey.

Molly Parker
as Maureen Robinson (28 episodes)

Molly Parker portrays Maureen Robinson, the matriarch of the Robinson family. Maureen is a brilliant aerospace engineer and a loving mother who does everything in her power to protect her family and ensure their survival in space.

Maxwell Jenkins
as Will Robinson (28 episodes)

Maxwell Jenkins plays the role of Will Robinson, the youngest member of the Robinson family. Will is an intelligent and curious boy with a knack for technology. He often finds himself in dangerous situations but uses his ingenuity to help his family survive.

Taylor Russell
as Judy Robinson (28 episodes)

Taylor Russell portrays Judy Robinson, the eldest daughter of the Robinson family. Judy is a skilled medical doctor who puts her knowledge to use in saving lives on their treacherous journey. She is compassionate and strong-willed, always looking out for her loved ones.

Mina Sundwall
as Penny Robinson (28 episodes)

Mina Sundwall brings Penny Robinson to life, the middle child of the Robinson family. Penny is witty and resourceful, often providing comic relief amidst the tense situations they face. She uses her creativity to find solutions to problems and bring the family closer together.

Ignacio Serricchio
as Don West (28 episodes)

Ignacio Serricchio plays the role of Don West, a charismatic and resourceful smuggler. Don becomes an unexpected ally to the Robinson family and helps them navigate the dangers they encounter in their quest for survival.

Brian Steele
as Robot (27 episodes)
Parker Posey
as June Harris / Dr. Zoe Smith (28 episodes)

Parker Posey portrays June Harris and Dr. Smith, a character with a dual identity. June Harris is a criminal posing as Dr. Smith, a manipulative and cunning character who often creates chaos within the Robinson family's journey.

Vanessa Eichholz
as News Reporter (1 episode)

Vanessa Eichholz plays the role of News Reporter, a character who provides updates and information to the public about the Robinson family's space mission. Her character serves as a connection between the family and the rest of the world.

Natasha Quirke
as Salesperson (1 episode)
Natalie von Rotsburg
as Resolute Security Officer (1 episode)
Richard Meen
as Mark (voice) (1 episode)
Evan Frayne
as Will's Test Supervisor (1 episode)
Michelle Martin
as Nurse (1 episode)
Shaun Parkes
as Captain Radic (voice) (2 episodes)
Iain Belcher
as Evan (3 episodes)
Kwesi Ameyaw
as T.V. Reporter (1 episode)
Bill Mumy
as Dr. Zachary Smith (1 episode)
Viv Leacock
as Reese (3 episodes)
Hrothgar Mathews
as Senior Resolute Official / Maureen's Boss (1 episode)
Christopher Pearce
as Resolute Official (1 episode)
Sakina Jaffrey
as Captain Kamal (1 episode)
Rowan Schlosberg
as Connor (4 episodes)
Veenu Sandhu
as Prisha Dhar (3 episodes)
JJ Feild
as Ben Adler (1 episode)
Selma Blair
as Jessica Harris (2 episodes)
Nevis Unipan
as Samantha (1 episode)
Brooke Baker
as Young June (1 episode)
Mia Bella
as Young Jessica (1 episode)
Jon Cor
as Resolute Officer (2 episodes)
Zehra Fazal
as Jupiter / Resolute Computer (voice) (2 episodes)
Angela Cartwright
as Sheila Harris (1 episode)
Rob LaBelle
as Me Jackson (1 episode)
Zya Acala
as Elise (1 episode)
Theresa Wong
as Dr Kinoshita (2 episodes)
Sibongile Mlambo
as Angela Goddard (11 episodes)
Ajay Friese
as Vijay Dhar (17 episodes)
Russell Hornsby
as Grant Kelly (5 episodes)
Madeleine Kelders
as Resolute Colonist (1 episode)
For the best insights and data about the TV show Lost in Space, visit our main Lost in Space page.