Title :
What's Past Is Prologue
Series :
Rating :
Overall Ep :
13
First Aired :
28 Jan 2018
Stardate :
1834.2
Director :
Year :
Writers :
Season Ep :
Plotline
On the ISS Charon, Lorca frees his old crew, who have been tortured since his disappearance. With the help of Mirror Stamets they are able to kill those loyal to Georgiou and take her throne. Georgiou goes into hiding.
On Discovery, Stamets works out that the power source of the ISS Charon, a massive fireball suspended below the ship, is the cause of the corruption in the mycelial network. If they can destroy it then the network will be able to heal itself.
Burnham evades capture and contacts the Discovery. They agree to a plan in which Burnham will lower the containment field around the power source and The Discovery will then arrive to destroy it. The ensuing explosion will then be used to ride into the mycelial network, from where Stamets will navigate them back to their own universe.
Georgiou agrees to help Burnham and together they attack Lorca's group. Rejected and defeated by Burnham, Lorca is then killed by Georgiou who throws him into the ship's power core. Georgiou offers to sacrifice herself to allow Burnham's escape. Burnham instead decides to take Georgiou with her as they are beamed to the Discovery and the Charon's power source is destroyed.
Back in their original universe, the Discovery crew learn that they have arrived nine months after they left, and, in the meantime, the Klingons have nearly won the war.
