 In casting Martha, the actress Freema Agyeman was reused from her minor role as Adeola Oshodi, in the Series 2 episode "Army of Ghosts".Acknowledging this, the resemblance of the two characters was touched upon in "Smith and Jones" when Martha makes reference to her deceased cousin, also serving to connect Martha to the larger "Doctor Who" universe.Throughout "Doctor Who" series three, Martha pined for the Doctor's affection.