Their Brother Lost in Space: Cast, Episodes & Where to Watch

What is Their Brother Lost in Space about?

Their Brother Lost in Space is a ReelShort original, and despite the title it is not a science-fiction adventure or a spin-off of the Lost in Space TV franchise. It is a family regret drama, the kind of story where the audience knows the truth long before the characters do, with a high-concept twist that gives the title its meaning.

Timothy was adopted as a child by the wealthy Snyder family, and he grew up adoring his three older sisters, Gianna, Helena and Arya. To Timothy they are not adoptive siblings. They are simply his family, and he has spent his life trying to deserve the home they gave him.

Everything changes the day the Snyders' biological son, Matthew, comes home. The family is overjoyed to have their lost child back, and at first there seems to be room for both brothers. It does not last. Matthew quietly sets about pushing Timothy out, using lies, staged incidents and well-timed manipulation to convince the sisters that the boy they raised is ungrateful, jealous or worse.

The cruelty of the first act is how well it works. One by one, the sisters start to believe Matthew's version of events. Timothy is blamed for things he never did, his protests sound like excuses, and the warmth he grew up with turns cold. Eventually he is cast out of the only family he has ever known.

What makes Timothy compelling is that he never stops caring about them. Even after being pushed away, he keeps finding ways to protect the sisters who no longer trust him, often without them knowing. And as the title hints, his choices eventually take him somewhere very far from the Snyder mansion. How he gets there, and what his family learns along the way, is the heart of the series.

It runs 55 episodes, and it is built for viewers who love a long, slow burn of regret that finally comes due.

Their Brother Lost in Space cast

Main characters

Timothy Snyder

The adopted son of the Snyder family, devoted to his three older sisters. Kind, loyal and slow to defend himself, he becomes the scapegoat once the family's biological son returns. Luke Dodge plays him.

Matthew Snyder

The Snyders' biological son, who returns home and sees Timothy as a rival for his family's love. He manipulates the sisters behind a charming face. Zachary Shadrin plays him.

Gianna Snyder

One of Timothy's three older sisters, played by Lindy Jones. Like her sisters, she has to decide who to believe when Matthew's stories start to pile up.

Helena Snyder

Another of the Snyder sisters, played by Maye Harris. Her relationship with Timothy is one of the ones Matthew works hardest to poison.

Arya Snyder

The third Snyder sister, played by Caroline Rose. ReelShort's tags hint at a musician in the family, and the sisters each have their own lives and pressures that Timothy quietly tries to protect.

Cheryl and Lawrence Snyder

Other members of the Snyder family, played by Nicole Dionne and Matthew Pohlkamp. How the wider family reacts to Matthew's return shapes how the household treats Timothy.

Why people are watching Their Brother Lost in Space

Regret dramas are one of the most popular formats in vertical TV, and Their Brother Lost in Space takes the formula somewhere unexpected. The usual version ends with a family realizing too late that they mistreated someone. This one ties that realization to a sci-fi twist that raises the stakes far beyond a family feud, which helps explain why it has passed 90 million views on Vertical Charts.

It is also a male-led story, which is less common on ReelShort. Timothy is not a hidden billionaire waiting to humiliate his enemies. He is a decent, wounded person who keeps doing the right thing for people who have stopped believing in him. If you are tired of smug revenge leads, his restraint is refreshing.

The structure is pure dramatic irony. The audience sees Matthew's schemes from the start, so every scene where a sister takes Matthew's side plays like a slow-motion mistake. The short episodes are built around those moments, and most of them end with a fresh injustice or a near miss where the truth almost comes out.

Luke Dodge carries the emotional weight well, and the supporting cast gives the Snyder household a real sense of a family, with distinct sisters rather than a single faceless chorus. The tone is heightened, the villain is broad and the tearjerker moments are deliberate. Go in expecting a melodrama designed to make you cry and cheer, and it delivers.

Tropes and themes

The returning biological child is a staple of family regret dramas. When a long-lost blood relative comes home, the adopted or substitute child suddenly has to compete for love they once took for granted, and the returning child often turns out to be the manipulator.

Regret is the payoff the genre promises. Viewers watch a family make terrible, unfair choices and wait for the moment they understand what they have lost. The emotional release comes from that realization, and from the question of whether forgiveness is still possible.

Family drama keeps the conflict close to home. There is no corporate takeover or mafia war here. The villain lives in the same house, the battleground is the dinner table, and the damage is to relationships people thought were permanent.

The male-lead label marks this as a story built around a man's sacrifice and loyalty rather than a romance. Timothy's arc is about proving his worth through action, even when nobody is watching.

How to watch Their Brother Lost in Space legally

Their Brother Lost in Space is a ReelShort original, so the official places to watch it are the ReelShort app for iPhone and Android and the ReelShort website at reelshort.com. Search the full title; typing only Lost in Space will mostly return the unrelated Netflix series and older films.

The series has 55 episodes. ReelShort also lists a trailer as episode zero, which does not count toward the total. According to the series page, the first seven episodes are free and premium episodes begin at episode 8.

After the free episodes, ReelShort works on coins and subscriptions. You can buy coins to unlock episodes one at a time, collect bonus coins through daily check-ins and rewarded ads, or pay for a subscription that unlocks the whole catalog for a set period. Prices vary between iOS, Android and the web and change with promotions, so check the current offers before you buy. If you plan to watch more than one ReelShort series, a subscription usually works out cheaper.

Avoid full-movie uploads on YouTube, Dailymotion or Facebook. They are unauthorized re-uploads, often missing episodes or padded with misleading links, and they do not pay the cast and crew. ReelShort's official social accounts post clips and trailers if you want a preview first.

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Their Brother Lost in Space FAQ

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