I Dream of Jeannie (1965)

S04E06 Djinn, Djinn, Go Home

Tony is startled when a peculiar dog appears at his front door, only to vanish and launch an unexpected attack on him. Just in time, Jeannie comes to his rescue, revealing that the mischievous creature is her long-lost dog, Djinn Djinn, whom she hasn't seen in two millennia.