A previous human expedition that Atlas dispatched to Mars in the 2070s. A remote base station was established. Atlas lost contact with the team some years before the current mission lifted. The crew of the current mission discovers the prior base’s existence en route to Mars (the Sequence 5 pilot reveal); they do not yet know the team’s fate.
This is Atlas’s withheld information. It is the show’s central long-arc mystery.
What is canon
- Atlas dispatched a prior Mars expedition some time in the 2070s
- A base station was established on the Mars surface
- The expedition was Atlas-organized, Threshold-launched, Watcher-sanctioned (the Federation’s Mars migration permission was already in effect)
- Communication with the base operated for some period
- Communication ceased at an unspecified time before the current mission lifted (years before, not months)
- The proximate cause of the loss is contact with Mars’s underground inhabitants. The Martians are hostile to human presence, and the prior expedition did not survive that contact
- By the end of Season 1, the current crew confirms what happened to the prior team and Mars becomes uninhabitable for the human mission as a result
- Atlas knows the base exists, knows when contact was lost, and has not informed the current crew. Whether Atlas knows the Martians caused the loss, or whether he has only inferred it, is reserved for the writers’ room
What is open
- The size of the prior expedition (handful of crew, dozens, or larger)
- Whether the prior crew were similar to the current twelve in selection process
- Whether the base survived the loss of contact, or whether the underground Martians breached and ended it
- The exact state of the prior crew given the Martian contact: dead, captured, transformed, hidden, or in some other state. The proximate cause is canonical; the resolution per individual is open
- The base’s location on Mars relative to the current mission’s landing zone
- Why Atlas dispatched the prior expedition (test run, full mission, parallel program)
- The mechanism of the Martian contact (overrun, infiltration, biological cause, technological cause, ritual or territorial cause, or something else)
- Whether the prior crew remembered Atlas as the entity that sent them, the same way the current crew will remember him
- Whether the prior expedition was sanctioned by the Federation under separate paperwork or under the same provisional permission
- Whether the Federation and the Watchers knew about the underground Martians when they granted Mars-migration permission, or whether the Martians are intel the Federation itself lacks
Atlas’s burden
Atlas dispatched the prior team. He lost them. He is now sending another crew, knowing what happened to the first.
This is the show’s central dramatic charge for him. Whether Atlas is sending the current crew because he believes they can succeed where the prior failed, because he has nowhere else to send humans, because he is testing something he cannot test alone, or because he is buying time, the bible leaves open.
When the crew learns what happened to the prior team, the question of trust becomes load-bearing.
Relationship to The Accident
The prior crew of this mission (the original twelve trained for the current expedition, killed in The Accident before lift) and the prior Mars base (the earlier humans Atlas sent to Mars, lost contact) are two distinct events. The bible leaves their relationship open:
- Independent: The Accident was sabotage, separate from prior-base loss
- Connected: whoever sabotaged The Accident also caused the prior-base loss; same opposing faction
- The Accident as response: someone wanted to stop Atlas from sending another team after he lost the prior one
All three are dramatic options. The series will earn the answer.
How the current crew learns
In the pilot’s Sequence 5, the ship’s instruments register an anomaly aimed at Mars. Sterling reads the data first. Brennan reads it next. Kade verifies. Atlas’s voice may surface briefly in the reveal, or not, depending on the writers’ choice.
The reveal lands as: humans have been on Mars before. The crew will not yet know:
- That Atlas sent them
- That contact was lost years ago
- That Atlas has carried this since the loss
These reveals belong to later episodes. The pilot ends with the door open.
What surfacing the prior base does for the show
- Recasts Atlas: he becomes the figure with a buried failure
- Recasts Brennan and Reeve: their survival of The Accident becomes layered (Atlas’s pattern of losing crews matters here)
- Opens a Mars storyline distinct from “first humans on a new world”: the new world is already partly known to Atlas
- Provides a long-arc target: the show must answer what happened to the prior team
- Adds dramatic stakes to every Atlas decision: he has lost crews before; trusting him is a choice the current twelve have to make