The season finale of The Event. It basically stated that aliens, (probably shapeshifting as they look like humans) are in government and were on Planet Earth long before humans.
Right at the end of the final episode they sucked their damaged planet (which looked like a blood red fiery Nibiru) via a stargate type porthole into Earths orbit, so they could invade Earth and wipe out all humans.
Just before this happened the alien leader told the US President that she had tried but failed to kill all humans with a virus as it was more humane, but as this plan was thwarted (by humans) we will all suffer much more horrific deaths instead (when the planet/Nibiru arrives).
Also, just before the planet (Nibiru) arrived, the world was experiencing massive earthquakes, floods and tsunamis.