Harris had been on Lost in Space -billed in last place on the opening credit sequence, but billed as "Special Guest Star" (though he was a series regular). Apart from this, Gary Conway received solo star billing in the opening credits, with the other regulars all receiving "also starring" billing. The show was originally intended to premiere as a midseason replacement in the spring of 1968, and the first 12 episodes were shot in the fall of 1967. This was changed and Giants premiered in September 1968 for a full season. The network screened the episodes in a significantly different order from the production sequence. This caused disconcerting lapses in continuity, since in the first 12 episodes filmed (but not in later episodes) the Giants moved slowly and hardly spoke. For example, "Ghost Town" was the 14th episode filmed (i.e. was not one of the original 12 episodes), but was the second episode aired. The cost of production was immense, partly because of the special optical effects needed to matte the little people into shots also showing the giants, and partly because of the gigantic mechanical props needed, for the little people to interact with, in shots depicting the giant-sized world in which they find themselves, and the futuristic spacecraft sets that were needed to represent the Spindrift. Because of the enormous cost, filming episodes in pairs using the same sets was more efficient and cost-effective, so writers were informed about what giant-sized props were available, which they could incorporate into their storylines. These episodes were filmed back-to-back. To save on production costs, Allen was not above using the same device he had employed on The Time Tunnel – reusing stock footage from 20th Century Fox's film library. For instance, in the episode "Collector's Item", footage of Wayne Manor from Batman is recycled as the luxury mansion home of a rich giant. In the unaired pilot of The Crash, no end scene has the giant dog in the garbage dump. Once receiving confirmation that Land of the Giants had been picked up by the network, the pilot was reworked, and production began on succeeding episodes. A break in production, though, occurred after 12 episodes were in the can (enough for a short run as a midseason replacement), until the show received the green light on the decision to launch it as a full season the following fall. Music Like Allen's