Concentrate and Ask Again

Summary

When a scientist falls dead after ingesting a lethal cloud of blue powder and his bones disintegrate in his body, the CDC suspects a biological attack. As the Fringe Team investigates further, a subject from Walter's past with ties to Olivia reluctantly agrees to assist with the intense case.

Guest stars

• Omid Abtahi as Simon Philips
• JR Bourne as Agent Edwards
• Jody Thompson as Sara Downey
• Paul Jarrett as Warren Blake
• Richard Keats as Don
• Ian Robison as George
• Sylvesta Stuart as Dillon
• Carlos Diaz as Randall
• Anna Van Hooft as Assistant
• Kevin Corrigan as Sam Weiss