<Li> Mina Sundwall as Penny Robinson, the 15 - year - old daughter and middle Robinson child . </Li> <Li> Ignacio Serricchio as Don West, a mechanic who also smuggles luxury goods . He has a chicken named Debbie, which he claims to be lucky . </Li> <Li> Parker Posey as Dr. Smith . She is a criminal and a psychopath who uses other people's identities to claim their belongings . Dr. Smith, whose real name is June Harris, stole her sister Jessica's identity and place on the colony ship . There she impersonates a Dr. Zachary Smith, to take his seat on an evacuating Jupiter ship . After landing on the planet, Dr. Smith attempts to sabotage the Jupiters' chances of being rescued by the Resolute while manipulating and gaslighting the survivors to avoid prosecution for her crimes . The theft of the doctor's identity is a reference to the corresponding Dr. Smith character of the original TV series . </Li> <Li> Brian Steele as the Robot, an alien mechanoid being that Will encounters on the planet that his family crash lands on . The robot has a different form from the ones on the previous series and movie . </Li>

Who plays dr smith on lost in space 2018