In "Effy", Sid is dragged by Tony to help him find his missing sister, Effy Stonem. Eventually, Sid and Tony come to blows, deriding each other's perceived character flaws: Tony sees Sid as wishing to emulate him, whereas Sid sees Tony as something he would never want to become. Later, Sid sees Cassie, agrees to meet with her, and the two finally kiss. Their reunion is cut short by a call from Michelle, which prompts him to try to find Tony and Effy who may be in danger. After he takes Tony and Effy to the hospital, he is the one to defend Tony, who he refers to as his best friend, against his parents' accusations.
