There was big drama both on and off the stage for American Idol (2.8/9) last night after longtime judge Randy Jackson announced he was leaving earlier in the day and the finalists were voted down to the final two. Now Kree Harrison and Candice Glover will face off in next week’s Season 12 finale along with, according to Ryan Seacrest, a “surprise duet” performance featuring Season 8 runner-up Adam Lambert. Coming off a string of all-time lows, Idol was up last night from last week’s results show. The Fox series rose 12% from its May 2 fast nationals and 8% from last week’s final numbers. ABC’s Scandal (3.2/9), meanwhile, surged up 23% from its May 2 show to not only beat Idol again in the key demo in fast nationals but also hit a series high for the political drama.