The unaired pilot is a veritable roller coaster ride of escalating events all crammed within roughly 60+ minutes. There's the boarding and freezing sequence, the launch, the meteor shower and resulting shipboard fire, the dive into atmosphere of Priplanus and the resulting crash, the discovery of the eccentric orbit (meaning the hard freeze) and the "bug-out" to reach warmer climes, Penny' disappearance and retrieval via jet pack, the encounter with the giant cyclops, the exploration of the ruins and the earthquake that strikes, the crossing of the inland sea and Don's near drowning and finally when the family reaches a seemingly safe haven where they give thanks, we see two bulbish skulled aliens observing them keenly, the show ending on a cliffhanger. Reads rather like the outline a "modern" blockbuster action film, doesn't it? Honestly, how could a production maintain that kind of pace for each new episode?
I wonder if Allen purposely crammed that much action into a "too long" pilot knowing it could not be aired "as is"? Why? To do what we eventually watched. Take the highlights from that pilot and parse the material over several episodes, filming additional "more economical" material to "bridge" or fill out those episodes. The net effect is that an initial batch of episodes get produced at a lower cost even with the expense of an unaired pilot rather than filming a somewhat more "modest" pilot and thus having to invest more in the subsequent stories.
Just a wild a$$ theory resulting from my being full of sh*t. Anybody got a laxative?
As for the Robot, I'm sure most of you know it was designed by Bob Kinoshita, the person who also engineered the final look of Forbidden Planet's Robby. Do you suppose Allen wanted to use Robby? Since it was owned by MGM, I wonder if it's "rental" on a continued basis might have been cost prohibitive and so Allen decided it would be cheaper in the long run to have his own built? If so, he might have asked Kinoshita, "Build me something as close to Robby without risking a lawsuit." After all, while we more observant fans can point out the differences, the casual viewer tends to confuse the two or assume B9 was simply a "redress" of Robby.
That brings up another speculation. Other than a short lived, live action Saturday morning series in which it was heavily modified, B9 was never used on any other series while Robby continued to make numerous "guest appearances" into the early 1980s. Why was that? Since both were Fox releases, I always thought it would have been great if B9 appeared in "Star Wars'" sand-crawler scene, tucked away in a corner partially obscured. Many, many other props and set pieces from LiS were used in later productions.
You gotta' admit, it's a classic design!
Sincerely,
Bill