: On Eros Station, mysterious "scientists" led by Dresden put the entire station on lockdown. They herd citizens into radiation shelters, ostensibly for protection, but actually to expose them to high doses of radiation to accelerate the protomolecule's growth.
: Miller and Holden meet for the first time on Eros. They attempt to hunt down Dresden but get trapped in one of the shelters during the radiation dump. Both are hit with lethal doses of radiation and must find a way to escape while fighting deteriorating health. : On Eros Station, mysterious "scientists" led by
The ninth episode of (Season 1) is titled " Critical Mass " . It originally premiered on February 2, 2016, as the first half of a two-hour season finale event. Episode Overview Title : " Critical Mass " Season/Episode : S01E09 Original Air Date : February 2, 2016 Director : Terry McDonough Writers : Robin Veith, Dan Nowak, and Mark Fergus Key Plot Points They attempt to hunt down Dresden but get
: The episode opens with a flashback revealing how Julie Mao and her OPA crew on the Scopuli were captured by the stealth ship Anubis . It depicts her father's involvement with a bioweapon—the protomolecule—which she unknowingly brought to Eros after being infected on the Anubis . It originally premiered on February 2, 2016, as
The episode follows two major narrative threads: the immediate crisis on Eros and a clarifying flashback of Julie Mao's final days.