Part 5/9:
With Roy apprehended, the heroes’ focus shifts to the real threat—Digger Harkness, the boomerang-wielding villain. As the duo works together, they encounter further trials, including a showdown at an Argus base, where Digger's relentless pursuit for revenge escalates. The stakes rise as Digger threatens to unleash bombs across Central City, pitting time against heroism as Barry and Oliver must choose between capturing the villain or saving innocent lives.