The Tomorrow People (1973) - 4x04 - Into the Unknown, Part 1: The Visitor- Followmy.tv

When Tim detects a signal from a drifting shuttlecraft, John and Stephen investigate and find a young humanoid alien called Kwaan. They take him to the Lab, where he tells them that he left the Father-ship to get help from his home-world of Regiorra. Kwaan communicates with the planet�s ruler, Tirayaan, who sends power to the shuttlecraft. Mike, John, Stephen and Kwaan return to the shuttlecraft, but it has drifted too far off-course and Kwaan will be unable to return to Regoraa, and so he decides to return to the Father-ship, which is trapped near a hole in space. As they approach the Father-ship the Tomorrow People lose communication with Tim and Elizabeth, and are unable to jaunt due a force-field.