Star Trek: Hidden Frontier - Season 6 (2005)

The Tholians make their move. Siroc tests a new weapon against Starfleet, while the largest meeting of Alpha Quadrant powers since the Dominion War is not going well. They know they need to band together against the Tholians, but the Federation is keeping secrets from its allies. The illegally joined Trill, Zen, has difficulty with his symbiont while the first-ever portrayed Tellarite Captain faces down the Tholians' deadly weapon.

McCabe, S'Tal, and Barrett engage in a dangerous secret mission. Shelby and Lefler reunite with a former captain to aid the Romulans with engineering upgrades.

In preparation for the major attack the Federation Alliance is about to undertake, Knapp promotes Naros to the command of the USS Helena. Knapp takes command of the fleet itself from Excelsior. Realizing Siroc may try anything to get to the Grey Dyson Sphere, Naros realizes that not only is he a target, but so are Elbrey and Artim. Shelby works on making sure her senior staff deal with the raw emotion of the loss of one of their own. Meanwhile, Siroc sets his own plan in motion to disrupt the incoming attack force.