This episode contains no deaths at all aside from a scorpion-like bug that Bellamy is seen eating. It's the fourth episode to have no deaths, others are Earth Skills (2014), Contents Under Pressure (2014) and The Tinder Box (2017).
When Ducette was describing to Bellamy how the Shepherd "climbed skyward", Bellamy mocked him by suggesting the Shepherd was either "rolling a boulder uphill" or "wearing wax wings and going for the sun". These are both references to ancient Greek myths: the first refers to Sisyphus and the second to Icarus.