Voyage to the Bottom of the Sea (1964)

S1E15 Long Live the King

Title: Long Live the King Plot: Following the assassination of a beloved monarch in a quaint, welcoming land, Seaview is tasked with escorting the young Crown Prince back to his homeland to claim his rightful throne. However, both Nelson—who finds himself ousted from his own cabin—and Crane struggle with the challenges of caring for a child. Their luck changes when an enigmatic elderly man, skilled in playing the flute, comes to their aid and forms a bond with the boy after he is rescued from the ocean.