Caligula, born Gaius Caligula, enters this account as the young man whose favor Herod Agrippa I pursued while both were still relatively obscure figures in Roman political life. At twenty-four years old, Caligula was perceived by Agrippa as the likely successor to the elderly and ailing Emperor Tiberius, prompting Agrippa to borrow an astounding one million drachma to cultivate a friendship with him. This pursuit of Caligula's goodwill proved disastrous when, during a chariot ride together, Agrippa carelessly expressed his wish that Tiberius would die so that his friend could become emperor. The chariot driver overheard this treasonous remark and reported it to Tiberius, who showed mercy by imprisoning Agrippa rather than executing him. Caligula's rise to power came swiftly thereafter, as Tiberius died within less than a year, reportedly smothered by Caligula himself with a pillow. As the new emperor, Caligula quickly pardoned his imprisoned friend and elevated Agrippa to tetrarch over the territory once ruled by Herod Philip, marking the beginning of Agrippa's political ascent in Palestine. Caligula's role in the narrative deepens when his own delusions of grandeur create a crisis for the Jewish people. Having decided he was a god deserving of worship, Caligula issued an imperial decree commanding that statues of himself be erected in every place of worship throughout the empire, including Jewish synagogues. This provoked outrage and bloodshed across Palestine as Jews resisted this desecration. The crisis escalated further when Caligula resolved to place a statue of himself in the Holy of Holies within the Temple at Jerusalem itself. Agrippa, who happened to be traveling to Rome at the time and learned of this decision, chose to intervene on behalf of the Jewish people. Though the precise method of persuasion remains uncertain, it appears Agrippa wrote a lengthy letter explaining the Jewish faith and offering political reasons for Caligula to retract his decree. This intervention succeeded, and Caligula desisted from his plan, an outcome that significantly boosted Agrippa's standing among the Jews. Caligula's own reign proved short-lived and increasingly unstable, culminating in his assassination in January of AD 41 after three years in power. His death paved the way for Claudius, Agrippa's childhood friend, to assume the imperial throne, which in turn led to Agrippa receiving rulership over Judea itself after thirty-five years of direct Roman control. Thus, Caligula's presence in this history functions as a pivotal link in the chain of political maneuvering that elevated the Herodian dynasty, while his self-deification and near-desecration of the Temple foreshadow the broader theme of corrupt, self-serving rulers whose pragmatic and idolatrous character stood in direct opposition to the Way of Christ.

Caligula enters the account as the emperor who freed Herod Agrippa from prison after Tiberius had imprisoned him. Described as crazy, Caligula not only released Agrippa but restored him to favor by sending him back to Palestine and granting him kingship over the northern region. This act allowed Agrippa to consolidate power, and when Caligula died in 41 AD, his successor Claudius extended Agrippa's rule over the entire area, including southern Palestine and neighboring territories. The narrative presents Caligula's intervention as the decisive step that positioned Agrippa to persecute the church, first by executing James and then by arresting Peter during the Days of Unleavened Bread. Agrippa's subsequent attempt to gain favor with the Jews through these actions, followed by his own death under divine judgment, illustrates how imperial politics intersected with the church's trials. Even amid such external pressures, the account emphasizes that the word of God continued to grow and multiply, showing that God's purposes advanced regardless of the rulers He permitted to rise and fall.

Caligula appears in the account of Herod Antipas's downfall as the Roman emperor who appointed Herod Agrippa king over the tetrarchy previously held by Philip. When Herodias pressured Antipas to travel to Rome and petition Caligula for a kingship of his own, Agrippa dispatched messengers ahead who accused Antipas of planning rebellion. Caligula accepted Agrippa's report rather than Antipas's defense, stripped Antipas of his territory in Judea and Samaria, confiscated his estates, and banished him and Herodias to Gaul. This outcome illustrates the material's larger emphasis on the consequences of moral compromise, weakness of character, and failure to value God's truth above worldly ambition, showing how such choices produce inevitable culling and loss even for those initially called or positioned within God's purposes.