Vondrax

Biology
The Vondrax had skeletal faces but without eyes. The ones encountered by the the Torchwood Institute had bowler hats on and suits.

Technology
The Vondrax developed Orbs, which, when they exploded emanated tachyon radiation.

History
The Vondrax originated in the first nano-seconds following the Big Bang. They launched an Orb to Earth which landed circa 1000 BCE. It remained frozen in the Artic until it was dug up and sent to Cardiff by the Torchwood Institute. Four people were sent to collect it but three of them where killed when it exploded. The sole survivor, Michael Bellini, then had the unwanted power of time travel. The Vondrax then have followed him until his death. (TWN: Trace Memory)