Dewshane Williams

When two desperate teenagers take hostages in a store, Parker uses a risky maneuver to reach one of them through the other.

Eric and the team try to save the life and sporting dreams of an up-and-coming baseball player in Louisville, Ky., whose survival hinges on negotiating for a bone marrow match that is being ransomed for $5 million.

Muphy reaches out to an unlikely source for help getting to Jess, but when Trey makes other plans, the whole thing blows up in their faces.

When Michael learns Cassandra has been keeping a secret, he and Nikita go to Moscow to confront her; Alex sends out a coded message, hoping to find her mother.

When MIT grad student Liam Cole (Charlie Rowe) discovers an asteroid is set to collide with Earth in 186 days, he joins forces with tech billionaire Darius Tanz (Santiago Cabrera) and the U.S. government to try and stop it – and together they stumble onto the greatest conspiracy never told, on the series premiere.

Darius and Liam work to invent a theoretically impossible piece of technology to divert the asteroid, and Grace risks everything to help Darius. Also, Liam heads home to Boston to track down critical research, but finds something shocking instead.