Doctor Smith disposes of a plant that grows to a gargantuan size and becomes attached to the Jupiter 2.



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Episode complete credited cast:
Will Robinson (as Billy Mumy)
Abraham Sofaer ...


Doctor Smith disposes of a plant that grows to a gargantuan size and becomes attached to the Jupiter 2.

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Release Date:

21 February 1968 (USA)  »

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Technical Specs


Sound Mix:

(RCA Sound Recording)


Aspect Ratio:

1.33 : 1
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Did You Know?


The name Sobram, given to the race of warriors who once dominated the planet, is derived from the name of guest star Abraham Sofaer. See more »


Even though Dr. Smith's plant which has attached itself to the top of the J2 has grown so big to clog up the intake vents, when we see exterior shots of the J2 avoiding missiles and releasing the Pod the plant is nowhere to be seen. See more »


The Robot: My computers indicate that the plant has attached itself to the outside of the ship as it thinks Dr. Smith to be its mother.
Dr. Zachary Smith: You tattletale!
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User Reviews

Lost in Space-The Flaming Planet
21 April 2012 | by (United States) – See all my reviews

Fun, if just as silly as usual, Lost in Space episode has a busy plot that brings everything together in the end. John forbids anyone bringing aboard planetary vegetative life forms, but Dr. Smith, no surprise, does. As usual, this leads to complications for the entire Robinson party. After passing through a dangerous radiation belt, the plant mutates into a creature, affectionate for Smith (it considers Smith its mother!). It grows larger and attaches to the Jupiter 2 when Smith exits it through the escape hatch, not destroying it because it would require extra labor. The air ducts are blocked and the oxygen levels are dissipating, so a nearby planet is their only option to use atmosphere to remove it from the ship. However, a lone, surviving member of a long-dead warrior race (who destroyed themselves during a long-term planetary war), the Sobrams, is close to dying and wishes for a member of the Robinson party to engage him in one last war games. Robot ultimately becomes the choice thanks to Smith's chicanery (he weasels out of being the one picked due to his devious, clever nature). But the plant creature may not have died while the Jupiter entered the planet's orbit and could wind up being more helpful than at first thought… The Space Pod makes a return appearance, with Don forcing Smith to accompany him to the world as missiles and a laser beam caused damage to the Jupiter 2 in an effort to halt the planet war alien's constant attacks from his central position. John, Will, and Robot return in the Space Pod when Don sends it back on auto-pilot. Anyway, all of the same effects seen times before are used yet again (the same missiles that look like rockets running the same trajectory, not to mention, the same radiation belt fly through we have seen before, nothing new) removing some of the thrill of Jupiter 2 in space, but it was nice to see the Robinsons off of a damn planet for a change, even if members of the crew return to the Sobrams planet during the last part of the episode. The plant monster bounces up and down to sounds of "Boing!" so it is a totally ludicrous creation, particularly at the end, wearing a battle helmet out of WWII, with a grenade pouch (when hit by a bomb or mini-rocket, it suddenly multiplies, curiously with helmets and grenade pouches…Lost in Space Creative rarely care about such illogic, enacting the "F&%k it" approach to the show, typically normal of the props dept. and the direction). I must admit I enjoyed this one despite myself, but the ineptitude of the plots and campy nature of the show has grown tiresome to me.

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