Oh yes, it was incredibly dark, one situation comes to mind, remembering this was the days of Buck Rogers etc...
The vessel belonging to the escapees is in for repairs to the engine, being performed by the love interest of one of the main characters. Whilst these repairs are taking place the Federation (the bad guys in this case) show up, and the lead character has two choices, be captured, or restart the engines whilst their love interest is still in the ignition chamber, obviously killing her. He ignited the engines, which was the complete opposite to what every other show of it's time would have done.