The Best Episodes Written By Helen Leigh

Mark and the team encounter new security measures from Cobel.

Mark answers the call to save an alien species, but the mission has unexpected personal consequences.

The Grayson household is upended when Mark returns to Earth with surprising new responsibilities. The Guardians of the Globe face dangers both at home and away.

Mark takes a stand, unaware of the ramifications for his family, the GDA, and even the Guardians. Cecil remembers his past and Eve makes an important decision.

Kyle attempts to get his family to safety as the town of Rome becomes increasingly overrun by the possessed. Anderson takes Megan under his wing, bringing her to find solace in an unlikely place. Chief Giles realizes his wife has been resorting to desperate measures.