Ah! I came in post Perpetual September but frequently am the only non-digital native about.

I watched Forever Knight, but not the episode That Didn't Happen; read about that online. Buffy I only know by osmosis; it was on cable. SG-1 I didn't actually see until sometime after 2005 iirc.

I missed most of LJ, joining them possibly mere months before DW. Besides MCU I've done Wilby Wonderful and a book series and that's pretty much it for 21st century fandoms.