Whistlespeak (S05E06)

While operating undercover in a society that hasn't yet reached warp capability, Captain Burnham grapples with the possibility of violating the Prime Directive when a cultural custom puts Tilly in jeopardy. At the same time, Culber seeks to strengthen his bond with Stamets, and Adira rises to the occasion when Rayner entrusts them with a role on the bridge.