Judging science fiction by plot, setting, and engineering

What does each panel member consider the best and worst science-fiction series?

There is no common ranking because the answers apply different standards to plot, world-building, engineering, nostalgia, and format across Stargate, Star Wars, Star Trek, Iron Sky, and Thunderbirds.

The answers use different criteria instead of forming an objective league table. Iron Sky is criticised for plot holes, Stargate is offered as a favourite, and pre-Disney Star Wars is praised for a lived-in setting whose machinery and infrastructure remain visible. Star Trek divides opinion between its television and film forms, with individual strong films separated from uneven franchise-level judgments. Technical plausibility, character development, world-building, and personal nostalgia lead to different evaluations of the same work.