Tread Perilously makes its way to Starling City for a visit with Arrow and the Huntress.

While Oliver Queen is still getting used to dating a police officer, the Huntress returns to kill her mob boss father once and for all. Meanwhile, Thea tries to prop up the most useless man in the DC Universe: Roy Harper. Tommy Merlyn (aka, The Worst) grouses about keeping Ollie's secret from Laurel (also The Worst). Laurel attempts to get her father listen to her mother's belief that Sarah is still alive. And back on Lian Yu, Slade and Ollie plan to take out a missile installation.

Erik and Justin immediately get lost in their enthusiasm for DC Comics. Erik welcomes dissenting opinions on his belief that Roy Harper is useless. Justin reveals his Jim Lee/Brian Azzarello sketch. He also revels in his love of Slade Wilson and actor Manu Bennett. Roy's parkour skills get scrutinized. Justin considers the caliber of actor worthy to portray Amanda Waller. Erik laughs through every scene featuring Tommy and both discuss how far The CW's DC Universe has come in five years. 

Erik also makes a prediction regarding Prometheus' identity.