The Ashton Kutcher-led sitcom dropped 8% from last week to just 10.39 million viewers and a 3.5 adults 18-49 demo rating at 9pm.
How I Met Your Mother dropped a tenth to a season low of 7.98m (3.4) at 8pm, while 2 Broke Girls also fell to its lowest rating in its first season of 8.71m (3.4) at 8.30pm.
Mike & Molly however was up slightly to 9.55m (3.2) at 9.30pm, with Hawaii Five-O also climbing to 10.19m (2.6) at 10pm.
NBC's The Voice dropped from last week but still topped the night's demo ratings with a peak of 10.72m (4.2) at 8-10pm. Smash levelled at 6.02m (2.1) at 10pm.
ABC's Dancing with the Stars just about equalled last week's rating and topped the night in terms of viewers with a peak of 16.82m (3.1) at 8-10pm.
Bones dropped four tenths from last week's Monday debut to 7.38 (2.1) at 8pm for Fox, while House also slipped to 6.06m (2.0) at 9pm.