 Kevin Fuller was cast as Walter Crane, the man with the bomb. The character did not say a word throughout the entirety of the episode, yet had such a strong presence, which the producers felt was unique for a guest star in the series. Fuller did "a lot of getting into the part," director Sam Miller felt that Fuller was one of the most influential actors he ever worked with. Elsewhere, Peter Sullivan, who plays Sarkisiian, never spoke Russian before. Since most of his dialogue would be in Russian, Sullivan was trained how to speak it phonetically before he would play the part.
