Martin (voiced by Stephen Root) is the father of Finn, having abandoned his son in a forest and being subsequently imprisoned in the Crystal Citadel for committing a "cosmic crime".
He abandoned his son in a forest and was subsequently imprisoned in the Crystal Citadel for committing a "cosmic crime". Martin (voiced by Stephen Root) is the father of Finn.
Martin (voiced by Stephen Root) is the father of Finn. He abandoned his son in a forest and was subsequently imprisoned in the Crystal Citadel for committing a "cosmic crime".
Martin (voiced by Stephen Root) is the father of Finn. He abandoned his son in a forest and was subsequently imprisoned in the Crystal Citadel for committing a "cosmic crime".