This is not the full song, this is only what is played at the start of the show!
Nerf Herder
Buffy theme song
Tabbed by me

G-----------------------------------
D------------------------0-(x8)-----
A----------------2-(x8)-------------
E-0-(x8)--3-(x8)--------------------
Play twice, 
then

G-----2p0----0-2-0-------0-2-0-----------
D----------2-----------2-------2---------
A-0-------------------------------2-hold--
E-------------------0---------------------

then finish with
G----------------------------------------------
D------------------------0-(x8)--1(x8)-2-2-2---
A----------------2-(x8)------------------------
E-0-(x8)--3-(x8)-------------------------------

with the -D--2-2-2-- at the end, you can either play the open E, or play both, or strum the two notes - 
A-7-- 
E-0--
,so as long as u play an E, it sounds right.