'Their Brother Lost in Space' Cast: Full List of Actors and Characters

The ‘Their Brother Lost in Space’ cast brings sibling rivalry to life in a vertical drama built on manipulation and redemption. Set between family turmoil and a secret space mission, this ReelShort story blends humiliation with selfless love.

“Their Brother Lost in Space” is a new short-form drama released by ReelShort that explores themes of event manipulation, humiliation, loyalty, and sacrifice. At the heart of the story is Timothy Snyder, an adopted son raised in what once felt like the happiest family.

Living alongside the three Snyder sisters, Tim grows up surrounded by love and acceptance. That peace is shattered when their biological brother, Matthew Snyder, returns and slowly begins to dismantle everything Tim holds dear.

As tensions escalate and secrets unfold, viewers are drawn into a story that blends emotional family drama with a high-stakes space mission. Below, we break down the storyline and introduce the full ‘Their Brother Lost in Space’ cast.

What Is “Their Brother Lost in Space” About?

The story follows Timothy Snyder, who was adopted by the Snyder family at a young age and raised as one of their own. Gianna, Arya, and Helena Snyder treat him like a true brother, never allowing him to feel different. For years, their bond appears unbreakable.

Everything changes with the arrival of their biological brother, Matthew Snyder. Jealous of the love and admiration Tim receives, Matthew begins manipulating situations to turn the family against him.

His most shocking act comes when he frames Tim for pushing him down the stairs, an incident that leaves Matthew unable to walk. In reality, Matthew caused his own fall to gain sympathy and destroy Tim’s reputation.

From that point on, Tim becomes the family’s scapegoat. He is humiliated, ignored, and treated as though he has betrayed the very people he loves. Even when he endures immense pain during a medical test, the family shows him little compassion.

Determined to repay the Snyder family for raising him, Tim makes a life-altering decision. He joins Project Hail Mary, a mission conducted by NASX in collaboration with Snyder Lab. Scientists are searching for a person with specific genetic traits required for a groundbreaking space mission, and Tim is identified as the ideal candidate.

At his request, his identity remains confidential. The mission demands that he spend 30 years in a coma while traveling into space to locate a planet capable of sustaining human life. It is a sacrifice that could save mankind.

As Tim prepares through intense physical training, he collapses during cardio exercises and is rushed to the hospital. Coincidentally, Matthew is there for an appointment with his sisters. Gianna instinctively moves toward Tim in concern, but Matthew manipulates the situation to pull her attention away. Meanwhile, Tim faces further humiliation when one sister pushes him off a stretcher.

Despite the cruelty he endures, Tim continues to care for his sisters. He even conducts extensive research and participates in testing aimed at restoring Helena’s eyesight.

The emotional tension surrounding his secret mission raises the central questions of the drama: Will the sisters ever learn the truth? Will they discover Matthew’s deception before Tim leaves Earth behind?

The "Their Brother Lost in Space" Cast

American actor and model Luke Dodge takes on the lead role of Timothy Snyder. Born on July 25, 2005, in Los Angeles, Dodge has built a growing reputation through vertical dramas, mini-series, and short films. His portrayal of Tim captures both vulnerability and quiet strength.

He is also known for appearances in ReelShort titles such as “Taming My Bullies,” “Tell Me Not To Love You,” and “Tutor Trap.” In “Their Brother Lost in Space,” Dodge carries the emotional core of the narrative, balancing heartbreak with resilience.

Zachary Shadrin plays Matthew Snyder, the story’s primary antagonist. Born on March 10, 2000, Shadrin studied acting for film and theater at the Ukrainian Film School. His portrayal of Matthew leans into calculated manipulation and quiet jealousy, making the character both frustrating and compelling to watch.

Lindy Jones portrays Gianna Snyder, the eldest sister and CEO of Snyder Group. A Texas-born actress based in Los Angeles, Jones holds a BFA in musical theater. In the story, Gianna is also the driving force behind Project Hail Mary, the ambitious initiative aimed at saving humanity. Her performance reflects the inner conflict between loyalty to family and belief in truth.

Maye Garner Harris plays Helena Snyder. Born in Raleigh, North Carolina, Harris discovered her passion for acting after moving to Houston, Texas.

She later relocated to Los Angeles to pursue her career. Beyond acting, she is also an oil painter, model, and writer. Her role as Helena adds emotional depth, particularly through the storyline surrounding her eyesight and Tim’s efforts to help her see again.

“Their Brother Lost in Space” stands out as a dramatic exploration of what it means to love unconditionally. The "Their Brother Lost in Space" cast delivers performances that ground the story’s larger-than-life space mission in raw human emotion.

For viewers drawn to intense family drama with a sci-fi twist, this ReelShort release offers both heartbreak and hope in equal measure.