Despite our initial observations, the habitable world of Aramar isn't exactly as Earth-like as was hoped. A shame, then, that this was determined so far after human colonization had begun, but luckily all of the colonists were in a ready position to simply load up for the journey home, perhaps to try again once conditions allowed it.
At least, most of them were. By some stroke of poor luck, or a grave error in accounting, one carrier ship failed to confirm its manifest before departing for the decades-long trip to Earth. Luckily, this only attributed to the loss of some industrial machinery, supplies, tools... and a set of 100 habitable cryo-pods, ready set with eager colonists.
Season 4 of The Virus Within
Trinity is familiar with zombies, being one herself, but when strange zombies start appearing, she realizes that the world she knew might be changing yet again.
When a dangerous set of scientific notes are discovered, Trinity and her friends don't realize anything is wrong until a frantic radio call comes in. Unaware of the notes, they race to the south and struggle to determine where the strange zombies came from. The zombies are unlike any ranks previously seen, and they aren't as predictable. Some have new tricks hidden up sleeves, forcing any Stronghold they encounter to quickly adapt to the new challenge or risk being overrun. Secrets never remain hidden, and zombie apocalypses never make life easy.