While decommissioning an old nuclear missile, a simple accident causes Team Scorpion to endure exposure to toxic vapor while trying to prevent the nuke from detonating. Also, Paige confronts Happy…

Clay is released on bail, Ani puts a plan to exonerate him into action, and the truth about Bryce’s murder finally comes to light.

The pressure of Clay’s arrest leads his friends to make risky decisions, and the full story of the brawl that erupted at homecoming emerges.

As the cops close in on Clay — their main suspect — violent confrontations at the homecoming game expose that everyone had a reason to kill Bryce.

Hannah’s mother returns to town. Urging Clay to protect himself, she reveals that there was more to Tony and Bryce’s relationship than Clay knew.

The cops name Clay as a person of interest in the murder. Ani catches Justin in a lie after learning Bryce bailed him out of a dangerous situation.

Mr. Porter interviews students about Clay, who pleads his innocence to Mrs. Walker. Learning Porter counseled Bryce, Clay and Ani question his motives.

The police interrogate Justin and Clay about the night Clay pulled a gun on Bryce. Clay discovers that Ani and Bryce’s bond ran deeper than he realized.

The police bring in Tony for questioning. At Bryce’s funeral, Ani uncovers two damning secrets.

The police search the school after finding steroids in Bryce’s car. Alex remembers how Bryce supported Alex after Jessica dumped him.

After Tyler admits he still has a gun, the group keeps tabs on him at school. But their worry deepens when they learn he had a motive to kill Bryce.

As the police investigation sets the school on edge, Ani remembers that Jessica confronted Bryce. Growing suspicious of Jess, Ani and Clay follow her.