Pakled: Ah yes!!! The episode where Mc Coy finds himself a lady (or one of them). As I recall they used a hollowed out asteroid, but you never got a feeling for a Dyson(2) effect. Although the Dyson(1)was thought of in 1957 and the episode you mentioned aired between '66 and '68 , perhaps it was before the Dyson(2) was fully thought out ???