IMDb says: Commander McLane and the crew of the fast space cruiser Orion patrol Earth's outposts and colonies in space and defend humanity from the alien 'Frogs'.
The poster, Raumpilot Rudy, who was gracious enough to post some of the episodes on Youtube further states: Raumpatrouille -- Die phantastischen Abenteuer des Raumschiffes Orion (literal translation: Space Patrol -- The Fantastic Adventures of the Spaceship Orion), also known as Raumpatrouille Orion, and Space Patrol Orion in English, was the first German science fiction television series. Its seven episodes were broadcast by ARD beginning 17 September 1966, six years before Star Trek first aired in West Germany (in 1972).
In the series nations no longer exist and Earth is united. Flying saucers, such as spaceship Orion, are flown by humans, whilst the aliens fly fighter jet-like contraptions. The titular ship of the series title, "Spaceship Orion", (German: "Raumschiff Orion") is portrayed as being a fast space cruiser (German: Schneller Raumkreuzer), the newest starship in mankind's fleet and the fastest spacecraft ever created by humans.
In an entertaining and ironic way the show tells the story of the American Commander Cliff Allister McLane (Dietmar Schönherr), an Earth starship captain and his loyal crew. He is Orion's commander in the developing war against an alien race called the Frogs. He is notoriously defiant towards his superiors.
What sounds like a fairy tale today, may be tomorrow's reality. Here's a fairy tale from the day after tomorrow. There are no more nations. Only humanity and its colonies in space. Distant stars have been settled. The ocean beds are inhabited. Space ships cross the galaxy at unimaginable speeds. One such ship is the Orion. A small link in a great chain of defense against threats from space. Let's join Orion and her crew on patrol at the edges of infinity...
There are six episodes up over at Youtube. Here's the first one, and you can find the others over there as well.