There are the same amount of episodes in Seasons 1 and 2, so there's three in each, six in all. And you're so lucky to have a friend that's so into your fandom - I have friends that will watch Glee, but they're not as into the fandom as I am, and I'm the only one who's watched BBC Sherlock as far as I can tell.
But a Sherlock marathon sounds really good. Maybe one day this summer I'll get Season 1 from the library and watch it with the recorded Season 2 eps I have. It's a spectacular program, it really is.
I'm an American too, but I heard that the PBS stations have been airing season 2 (like tonight, they're airing the finale at 9 - I'm taping it, so excited) and if you look hard enough, you can find the season 2 eps online. The DVD set is also available to order, or so I've heard. And if you think tumblr's recounting of the episodes are maddening, you'll be reacting ten times that when you see the whole thing. It's flawless.
My favorite part is seeing the little references they make to the original series. God, I love this show far too much.
-M
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