This mission where you have to beam into StarBase 24 after killing 20 more Kilngon Battleships and save six scientist, the last part broke on me when you have to talk to the USS McCoy after defending her against the Kingons at the rally point. I passed her up with full impulse and missed the chance to talk to her. When I got my bearings and turned about back to the becon, she was gone. The other escort ships were still there , but USS McCoy was no where. I had to warp out and start over, it put me at the point to kill 20 more Klingon battleships again, and had to beam into the SB24 again.
I am not saying its broke, but just be careful not to pass up the target ship you have to talk to.