Henry questions Martian's thinking. Bosko is briefed by Langley on a top-secret operation. Poppy makes a startling discovery. Martian confronts Sami about why she's in London and finds a needle in a haystack, before a heated session with Dr. Blake.

Feeling the heat from Langley, Henry sends Owen to hunt for clues in Minsk. Danny's work with Reza generates an unexpected outcome. Sami is confronted by Osman about sensitive issues. Martian, seeing the size of the stakes, sets a rat trap.