Lucas races to finish assembling his mystery device; Taylor and Jim confront the mole; Skye encounters a familiar face.

Cast: Jason O'Mara, Shelley Conn, Christine Adams, Allison Miller, Landon Liboiron, Naomi Scott, Rod Hallett, Alana Mansour, Stephen Lang, Simone Kessell, Dean Geyer, Ashley Zukerman, Damien Garvey, Damian Walshe-Howling, Jay Ryan