Rubbish - when the BBC showed Trek it was buried in the weekday tea-time 'kiddie' slot on the relatively unwatched BBC2. Doctor Who is schedule centre, peak family viewing Saturday evening fayre. There is nothing more mainstream.
When I say "mainstream", I meant it as "mainstream for earth", not "mainstream for a tiny country in Europe".
Where Dr. Who needs a special to once in its lifetime air in 94 different countries at the same time, Star Trek, with most of it's television shows (and movies) did more than this weekly.