Yet another eccentric alien (Torin Thatcher) shows up on the Robinson's adopted planet, this time it's a 'Space Trader' who disrupts the family's food source in the hope that they'll trade anything to get some supplies. Needless to say, only Dr. Smith willing to trade, and only to get a stash of delectables for himself. The inconsistences that plagued the show's writing continue - after the Trader's disastrous 'storm', the family faces a critical shortage of food and water (they are reduced to eating 'protein pills' to stay alive) despite Will having successfully gone fishing in some nearby waterhole just 3 episodes earlier, the Trader's spaceship is clearly too small to hold all the stuff he has on display (another 'bigger on the inside than on the outside' vehicle?), and the final send-off of the irate villain ignores the fact that he has a weather-control machine and an invisibility device (why even introduce such a gadget if it is not to be part of the story?). Dr. Smith continues his slide into camp-villainy and his lines include inanities such as suggesting that robot is getting fat (perhaps this was a joke but there is no witty comeback from the robot). Only 23 episodes into season 1 and the plots and characters are becoming repetitious and predictable. A highlight is seeing the 'dog-wrangler' peeking out from behind the alien ship just after the Trader's guard dogs go after Will and Smith. Once again, the Jupitar 2's cargo appears to have contained the oddest things for an interstellar space expedition: this time, WW1 era 'tin hats' - the kind issued to the allied troops sent off to fight the Huns in France.