<P> There were also sequels to some episodes ("Return from Outer Space" follows from events in "The Sky is Falling"), and some recurring characters including Space Pirate Tucker, the android Verda, the Green Dimension girl Athena, and Farnum B (each of whom appears in two episodes), and Zumdish (who appears in three episodes). </P> <P> In an odd moment of referential continuity "Two Weeks in Space" re-used the "Space Music" angle first shown in "Kidnapped in Space", while the "Celestial Department Store Ordering Machine" appeared in two episodes . </P> <P> In early 1968, while the final third - season episode "Junkyard in Space" was in production, the cast and crew were informally made to believe the series would return for a fourth season . Allen had ordered new scripts for the coming season . A few weeks later, however, CBS announced a list of television series they were renewing for the 1968--69 season, and Lost in Space was not included . Although CBS programming executives failed to offer any reasons why Lost in Space was cancelled, there are at least five suggested reasons offered by series executives, critics and fans, any one of which could be considered sufficient justification for cancellation given the state of the broadcast network television industry at the time . As there was no official final episode, the exploring pioneers never made it to Alpha Centauri nor found their way back to Earth . </P> <P> The show had sufficient ratings to support a fourth season, but it was expensive . The budget per episode for Season One was $130,980, and for Season Three, $164,788 . In that time, the actors' salaries increased; in the case of Harris, Kristen and Cartwright, their salaries nearly doubled . Part of the cost problems may have been the actors themselves: director Richardson saying of Williams' demanding closeups of himself: </P>

Did the robinsons make it back to earth