Let's see what
Instant Watcher says is available.
Black Books - Black UK comedy about a hateful bookstore owner.
Black Adder - Black UK comedy about a conniving scoundrel throughout history. Start with Season Two's zany Elizabethan antics.
Doctor Who - For New School start with "Blink" and "Human Nature"/"The Family of Blood" from Season Three. For Old School start with "Pyramids of Mars" and "City of Death".
Father Ted - UK comedy about priests. Yes, priests.
Ultraviolet - No relation to the movie whatsoever, this is the best TV show about vampires ever made, not least because it doesn't use the word "vampire" at all. Bonus: Idris "Stringer Bell" Elba!
Luther - Badass detective show starring Idris Elba. You need more Idris Elba in your life!
Sherlock - The awesome contemporary incarnation starring Benedict Cumberbatch.
Sherlock Holmes - The awesome classic incarnation starring Jeremy Brett. Start with The Adventures of Sherlock Holmes (1984).
Blue Planet - David Attenborough's nature documentaries are all fantastic. This doesn't have the HD wow factor of Planet Earth or Life, but it's still amazing.
I'm also told television comes from places other than the UK.
Twin Peaks - Off-kilter crime show from David Lynch and Mark "Hill Street Blues" Frost. When the show is firing on all cylinders it's amazing.
Kolchak: The Night Stalker - Classic precursor to the X-Files.
Columbo - Peter Falk rules OK?
White Collar - Fun show about a FBI guy who teams up with a con artist. If you like Burn Notice, you'll probably dig this.
Lonesome Dove - Epic Western miniseries. Also, snag Shogun via the Netflix disc service for an epic Eastern miniseries.
FnordChan