When Jedikiah visits Earth, there are actually three versions of him now in existence. The time traveling Jedikiah from the future, the Jedikiah floating in space after the encounter in The Slaves of Jedikiah: Part 5 (1973), as well as an entombed Jedikiah in Egypt as a result of the earlier events mentioned in The Revenge of Jedikiah: Curse of the Mummy's Tomb (1975). Jedkiah being entombed in Egypt is also a future result of the events Jedikiah is now acting out as a time traveler occurring in the present, which would eventually wind up with Jedikiah being in the past.
Peter states to Carol that Jedikiah was not actually an android, but that he was a type of unknown shapeshifting alien and that only one of his forms was an android. This idea was not picked up on, and later adventures and encounters with Jedikiah clearly indicate that he is a machine.
This episode takes place in 1973 and 2526.