As Red sets Liz and the Task Force on the trail of an eco-terrorist with a mysterious connection to Alexander Kirk, Tom takes matters into his own hands.

Liz's loyalties are tested as Red takes action on an operation to intercept Alexander Kirk. Meanwhile the Task Force races to find a killer who targets inventors of revolutionary technology.

Red pressures Dr. Shaw to locate a former patient. Liz contemplates the implications of her ties to an increasingly desperate and dangerous Alexander Kirk. Mr. Kaplan comes to a critical realization about her future.