Banished for his cowardly behaviour that almost cost John and Don their lives (and put young Will at risk), Smith steals some of the precious deutronium fuel to ensure that the Robinsons won't leave without him. He then discovers some improbable secrets about the local plant life (as does Judy (Marta Kristen)). While not making a lot of sense, the episode has some good imagery (notably the engulfment of the Jupitar 2 by the titular plants) and Judy is given more to do than worrying, getting her hair done, or helping with dinner or in the garden. While Harris's Doctor Smith continues to get more and more screen time, the character is still far from the endearingly (to some) whiney over-the-top comic caricature he eventually becomes - here he is a craven liar, selfish, stupid, lazy and obnoxious to a point where the Robinson's continuing acceptance of him is becoming inexplicable (especially doting space-mother Maureen Robinson (June Lockhart) who seems to forgive him without comment even when he repeatedly puts her children at risk). Not great but an improvement on the previous episode. Judging from some of the comments about Judy's taste for salad, 'MeTV' must be cutting sequences out of the episodes to squeeze in more commercials. As a side note: I recently watched 'Beach Blanket Bingo' (1965) - Marta Kristen makes a pretty sexy mermaid (who could blame Bonehead for trying to get some tail).