ok according to the episode list of abc the double episode is
11-12 (revelation zero, part 1 & part 2) - 20100318
13 - blowback - 20100325
14 - better angels - 20100401
15 - queen sacrifice - 20100408
i guess the numbers are wrong on some episodes here... episode 12 should be renamed 13 and episode
13 should be 14.