In this final episode of the Trinity series we trace the doctrine from its Old Testament roots to its full flowering in the New Testament. Using key passages—Jesus’ baptism, the Great Commission, John 1, John 14–16, and 2 Corinthians 13:14—we see the Father, Son, and Holy Spirit acting together as distinct persons yet one God. The episode also explains why common misunderstandings (modalism, Arianism, partialism) conflict with Scripture, and offers practical clarity for Christians wrestling with the mystery of God’s nature. Stay tuned for upcoming episodes on the resurrection and a mini-series on AI and contemporary issues.