ABC’s midseason drama Happy Town is fading fast. In its second airing last night, the mystery drama (1.2 rating/4 share among adults 18-49, 3.9 million viewers overall) dropped 29% in the 18-49 demo from its disappointing premiere last week. Also down 29% week-to-week in its second outing in the higher-profile 9 PM time slot was NBC’s bubble freshman Mercy (1.0/3), hitting a series low in the new tryout time period two weeks after hitting an all-time-low in its regular 8 PM berth. Mercy faced stiffer competition this week, with CBS’ Criminal Minds (3.3/9) returning to originals.

Meanwhile, Happy Town’s steep decline was due in part to the overall slide of ABC’s comedy lineup. The Middle (2.2/7) was down 8% from last week, Modern Family (3.8/11) down 10% and Cougar Town (2.4/7) down 14%. And it’s not that Happy Town viewers migrated to the broadcast competition at 10 PM. NBC’ Law & Order: SVU (2.6/8) was down 10%, CBS’ CSI: NY (2.2/7) down 15%.

Fox’s American Idol result show (6.3/17, 19.1 million viewers), which won the night for the network, rebounded slightly from the low numbers for the performance show on Tuesday, up by 2% in adults 18-49 and by 9% in total viewers.