Stargate: Universe follows a more continuous style of flow to the series rather than the more normal episodic or different story type versions as compared to SG1 or Atlantis. The first 3 episodes were in fact 3 parts. The same follows for episodes 4 & 5 – part one is Darkness and part two is Light – very appropriately named as you will soon find out.
A day after the life support has been fixed (which was at the end of episode 3), Dr. Nicholas Rush attempts to repair other systems on the Ancient ship Destiny. Tired & shaken an exhausted Rush snaps at others when they ask for his opinion and finally has a nervous breakdown. The crew discover 90,000 liters of water which is good enough to loosen the reins of rations. The systems are being drained of power which is a major concern. The crew meanwhile decide to record individual messages on the Kinos in case someone discovers the ship years later.
Lt. Scot is ordered by Col. Young to work on the working shuttle and Adam Brody is fetched to translate the controls from Ancient to English to help the process along. While Chloe takes a shower Eli is confronted by many of the crew who want him to be their man within the military personnel and Rush and inform them of any developments. Soon many systems start failing due to lack of power and finally the FLT drive also stops. Destiny approaches a star system.
A now calmer Rush enters into the shuttle with Young, TJ, Greer and Scott. Rush remarks that some of the stickers with the translations Brody added were backwards. With the ship going to pass through a gas giant (which Scott names Big Bertha), they will use its gravity to slingshot the ship deeper into the star system, hopefully finding out if any of the planets are habitable. They have six minutes until this happens. By then, they have to spread the word for everyone to brace themselves for the upcoming turbulence.
The plan works, however Rush notes that the trajectory has altered more than they expected and Destiny is headed straight for a giant star and what they know is instant doom!
Espiode5, Light, starts with the crew looking at an inevitable crash into the star and despite 3 planets nearby they have no way of altering the ship’s course. However the second shuttle is working and it has power and can sustain 17 passengers. Col Young, as leader of the mission, announces to the crew that they are to have a lottery to decide who are the 13 people selected to go on the shuttle – he has already decided that 2 people must go by default – Lt.Scot as only he can fly the shuttle and TJ as she is the only medic.
Young has already decided to exclude his own name from the lottery and later Dr. Rush also decides to do the same. Eli watches in pain as Scot & Chloe go hand in hand to be alone, where they kiss and then make love. In Chloe’s mind, she is saying goodbye as she doesn’t believe that she will be going. Meanwhile two of the 3 planets are rules out – one is too hot and the other too cold. That leaves the 3rd which is harsh and it will be tough but they will be able to survive there.
At the predetermined time the remaining 13 are called out and they enter the shuttle along with TJ and Scot. The rest of the crew retire to their quarters and wait for the inevitable death as the ship reached the star. A little later Rush comes out of this quarters and notices a system coming online – the ships’ shields are protecting it and the crew from burning up and the ship is also drawing in power from the star! Lights start coming on everywhere in the ship and power is being restored. The ship actually is programmed to approach a star to recharge it’s power.
Now the crew on board the Destiny inform the shuttle of the situation and after a tough maneuvering, Lt. Scot is able to land the shuttle back onto Destiny and the jubilant crew is reunited. Although he initially commends Dr.Rush on his bravery & sacrificing his chances on the lottery, as the scientist dismisses it, Col. Young suspects that Rush knew all along that the ship had a plan to recharge all along.