for the pay-tv channel syfy he differentiates scientifically based and fictional components of star trek in the series "star trek – science vs. fiction". from april to the end of 2007, lesch moderated the weekly 5-minute program sci_xpert for this channel, which dealt with viewer questions, which mostly had to do with feasibility of science fiction concepts (such as "how realistic are the huge spaceships from independence day?"), but which also addressed purely scientific topics (for example "what is gravity?"), which were handled in the tradition of alpha-centauri. there were a total of 35 episodes.