This show has to have been one of the biggest disappointments on TV that I can remember.
Flash didn't even have a spaceship.
Instead he traveled back and forth to Mongo through a hole in space.
There is already a show that employs such a plot device: its called Stargate.
If producers want this show to last, they are going to need to show viewers more of Mongo's dictatorship and less of earth as that segment was about the only one worth watching.