As far as we know, Lost
has no supernatural elements.
And if you assume the Prophets are really just wormhole aliens, DS9
is totally within the realm of science as well.
I haven't seen it, but I suppose that qualifies Terminator: The Sarah Connor Chronicles, since it is a TV series after all?
That definitely counts.
Farscape had Zhaan, a Delvian priest who displayed many mystical abilities. It also had people switching bodies, etc... (I love Farscape dearly but there's a lot of supernatural elements to be found).
Zhaan's abilities could have been natural for her species. Switching bodies isn't inherently supernatural.
"Supernatural" is different from "silly pseudo-science" - the latter abounds in TV sf.