When I saw the first episode on DVD, I was intrigued. I continued watching, an quickly fell in love with it, and I saw soon addicted to it. When it came to the 6th episode, "Welcome Stranger", I was extremely disappointed. I still can't watch it - a space cowboy, awful acting, annoying over-the-top accents, and an awful fight scene which almost looks like the early stages of a gay sex scene instead. After that, I as cautious, but the series continued excellently. The season finished on the amazing "Follow The Leader".
I had the complete 1st Season only, and soon bought Seasons 2 & 3. I was hoping that Irwin Allen would change direction becuase, despite the 1st Season's excellence, it was getting repetetive. Dr. Smith gets family in trouble, Will disobeyes his parents' orders and becomes a young hero, the Robot making funny lines. All of this is was good, but was getting repetitive, and the other characters were somewhat getting more & more minor with each episode. I was also hoping that in the 2nd Season, the females would be able 2 take care of themselves a bit more.
Well, I began the 2nd Season and was happy 2 see colour. But it looked stupid, it was TOO colourful. I then quickly noticed how things hadn't changed at all, and now the characters other than Dr. Smith, the Robot, and Will were almost completely forgotton. The dialogue was ridiculous, everything was re-used (such as machines, costumes), and the plots were plain stupid. No wonder the show was overshadowed by Star Trek. Thankfully, there was a good episode here and there (these were "Wreck of the Robot", "The Colonists", "The Phanton Family" and "The Android Machine"). I watched less and less frequently, before FINALLY it was over! YAY!
After a month, I began watching the third season. Instantly, I noticed the colourfulness was significantly toned down. And in only the first episode, I noticed how it was more serious. As it progressed, I noticed how other characters were getting a bit more of a chance, but Dr. Smith was still involved in EVERYTHING. I was annoyed when I watched "The Time Merchant" because it makes Dr. Smith's hijacking of the ship a good thing! In other words, all of Dr. Smith's 'badness' was wiped out. As I kepy initial relief was smuttered a bit, because most of the episodes were OK but very forgettable, some were awful, and the only ones up to the standerd of Season 1 were "The Anti-Matter Man", "Condemned of Space", "A Day At The Zoo", "The Space Primvals", and "A Visit To A Hostile Planet". Then came te infamous "The Great Vegetable Rebellion". I was so horrified by its awfulness that I looked it up. Turns out Irwin Allen had no other idea on his mind. WTF? Why didn't he write something without Dr. Smith in it? Something focusing on Don or Maureen, who had no episodes at all? Then it finished on a medicore note, "Junkyard in Space". It doesn't suprise me that the series was cancelled.
And there were a few problems that ran through the entire series apart from overuse of those 3 characters. For example, when an alien attacked and injured one of the family, why did it almost always have to be Don? And in a fight with an alien, Don always got pwned. Maybe it was because only Don and John were "eligable" to get into an alien fight, and John couldn't be the one pwnd, because he was the "cool father" of the family. So it was always Don. Irwin Allen unfortunately never tried anything new or different with the series, and it just seemed stupid and repetetive.
So, in conclusion, Season 1 is great (except for "Welcome Stranger"), Season 2 is awful apart from 4 episodes, Season 3 is OK but forgettable apart from 5 episodes.