Polonium 210 is stolen from a British nuclear plant. An elderly former colleague of Dorn joins the investigation. He provides useful expertise, but clashes with Carine regarding the direction the investigation should take.

Cast: Goran Visnjic, Elizabeth Mitchell, Tom Wlaschiha, Lara Rossi, Stuart Martin, Naomi Battrick, Donald Sutherland, Patrick Bauchau, Lex Shrapnel, Richard Katz, Joseph Wicks, Eva Larvoire, Ema Stanková, Ondrej Kavan