The series was initially to have been a continuation of Journey into Space, using the cast who'd just made a one-off revival of that series, The Return from Mars. This idea was dropped late in the day, and the four characters are noticeably renamed versions of the Journey into Space quartet, while Henson's character Chipper is stated to be the grandson of Lemmy from Journey into Space.
The episodes of the first series, entitled "Space Force" and broadcast in 1984 were called:
"The Voice from Nowhere"
"Towards the Unknown"
"The Silver Strangers"
"The Time Ship"
"Threshold of the Stars"
"Marooned in Space"
The episodes of the second series, entitled "Space Force 2" and broadcast in 1985 were called: