Their Brother Lost in Space
In Their Brother Lost in Space movie, Timothy, adopted by the wealthy Snyder family, grows up devoted to his three older sisters — until the day their biological son, Matthew, returns and turns them against him with lies and manipulation. Cast out and blamed for things he never did, Timothy still repays their kindness: he saves them, sacrifices for them, and even secretly volunteers for Project Hail Mary, a mission to save humanity by sending one person with a rare gene into find a new planet. Only after he's gone, do the Snyders discover the truth about Matthew's schemes and Timothy's sacrifices. Thirty years later, Timothy succeeds on Planet Artemis, honored as a hero while his grieving family lives with the cost of their betrayal.
Genres and tropes
Story guide
See the main plot, character relationships, and setting before deciding whether this drama is for you.
Cast out when the Snyder family's biological son returns, adopted son Timothy secretly volunteers for a thirty-year space mission that may save humanity, leaving his family to discover his sacrifices too late.
Explore the full story Characters, world, and episode guide
Setting and world
A near-future world split between the powerful Snyder household and NASX's Project Hail Mary, where a rare gene may determine humanity's chance to find another planet.
Narrative framework
The drama intercuts Timothy's final days on Earth with the family's escalating rejection. His private gifts and mission preparations accumulate while Matthew's lies hold, so the later discovery is driven by evidence the family ignored in real time.
Main character relationships
Swipe to exploreDevoted brother to Gianna, Arya, and Helena; displaced by Matthew
Timothy keeps repaying the family that rejects him, then turns his rare Pilgrim gene into a final sacrifice for both them and humanity.
Timothy's replacement within the Snyder family
Matthew frames Timothy and uses the family's preference for blood ties to make every sacrifice look like manipulation.
Timothy's older adoptive sister
Gianna helps build the project that needs Timothy, yet fails to recognize that her rejected brother is its anonymous volunteer.
Receives Timothy's cybernetic-eye research without knowing its cost
The cybernetic eye Timothy develops for Helena makes his devotion tangible and exposes how little the family understood before he left.
Core story elements
Matthew's return turns belonging into a contest the adopted son cannot win through sacrifice alone.
A rare gene and a long-duration mission connect the family melodrama to humanity's survival.
Timothy hides his mission and gifts, so the family learns their value only after losing access to him.
The thirty-year mission makes delayed recognition permanent rather than easily repairable.
Their Brother Lost in Space cast and actors
| Actor | Role / credit | Same-actor trail |
|---|---|---|
 Luke Dodge | actor | View actor works |
1 cast credit
Known titles, pinyin, and aliases
- SceneTrace title
- Their Brother Lost in Space
- Chinese title
- 迷失太空的兄弟
FAQ
Where can I watch Their Brother Lost in Space, and how much does the available player cover?
Official listings include ReelShort.
How many episodes does Their Brother Lost in Space have?
Their Brother Lost in Space is listed with 55 episodes.
What situation sets the comeback or revenge arc in motion in Their Brother Lost in Space?
Cast out when the Snyder family's biological son returns, adopted son Timothy secretly volunteers for a thirty-year space mission that may save humanity, leaving his family to discover his sacrifices too late. The concrete mechanics include Adoption versus blood: Matthew's return turns belonging into a contest the adopted son cannot win through sacrifice alone; Project Hail Mary: A rare gene and a long-duration mission connect the family melodrama to humanity's survival.
How are Timothy Snyder and Matthew Snyder connected in Their Brother Lost in Space?
Timothy Snyder (The adopted son and Project Hail Mary volunteer): Devoted brother to Gianna, Arya, and Helena; displaced by Matthew. Matthew Snyder (The biological son who engineers Timothy's exile): Timothy's replacement within the Snyder family. Gianna Snyder (Snyder heiress and leader tied to the mission): Timothy's older adoptive sister.
Which alternate titles can help when searching for Their Brother Lost in Space?
Other useful title forms are 迷失太空的兄弟.
Viewer Reviews
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