Battlestar Galactica (1978–1979)

The original Battlestar Galactica follows the remnants of humanity as they flee the Cylon threat aboard the battlestar Galactica, searching for the legendary planet Earth. The series blends space opera adventure with themes of survival, faith, and cultural displacement as the fleet navigates hostile encounters and internal tensions. Its mix of large-scale battles, episodic exploration, and mythic undertones helped shape an early vision of serialized science-fiction storytelling on television.

Från IMDB:
After the destruction of the Twelve Colonies of Mankind, the last major fighter carrier leads a makeshift fugitive fleet on a desperate search for the legendary planet Earth.