The episode is defined by its exploration of loyalty and the "long game". After a daring heist in the preceding episode, Alfred and his allies believe they have secured the deadly chemical weapon . However, the title's biblical connotations of peace—the lion lying with the lamb—are subverted by a series of betrayals:

The 2021 season finale of Pennyworth , titled "," represents a pivotal shift in the series' narrative, transitioning from a grounded espionage drama into a more heightened, "super-powered" corner of the DC Universe. Directed by Danny Cannon and written by Bruno Heller, the episode aired on April 11, 2021, and serves as the culmination of the "Project Stormcloud" arc that dominated the second season. Narrative Complexity and Deception

The English League discovers they were handed a fake weapon, while the real Stormcloud remains hidden in London.