Here is what happens in the ending ofseason 1 ofCommon Side Effectsand how it sets up season 2.

Although they are best friends, they increasingly become divided over the investigation into Marshall.

The season ends on an ambiguous note for both characters.

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Awakened by the mushroom, Copano is last seen in his hospital room.

Given his investigation, Copano will likely continue to look into the conspiracy.

A bigger question mark is Harrington, who ends the season riding a motorbike into the desert.

imagery-from-Common-Side-Effects (1)

Custom Image by Yailin Chacon

By contrast, Rick’s efforts to work with Frances drive her right back to Marshall.

However, his work with her and the mushroom has led to its refinement into a food additive.

The additive is shown to quickly become a success, earning Rick a major win.

Common Side Effects Season 1 Finale 12

What Is Hildy Planning In Common Side Effects?

Similar to Rick, Hildy ends the season with a victory.

What Happens To The Rest Of Common Side Effects' Supporting Cast?

Marshall Kusso looking out at the screen and also staring at a turtle in Common Side Effects

Frances' former colleague Kiki has has remained alongside Rick, seemingly taking her place as his primary partner.

The true nature of these creatures remains one of the show’s biggest mysteries.

These actions get people killed and cause a lot of unintended destruction and pain.

Common Side Effects Season 1 Finale 9

However, the show also rewards those who find empathy.

Copano saves Marshall, and is in turn saved by Harrington.

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Common Side Effects Season 1 Finale 8

Common Side Effects Season 1 Finale 10

Common Side Effects Season 1 Finale 3

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Common Side Effects