An extra-long Dancing With The Stars helped ABC retain its dominance over Monday night:

8pm

• Dancing With The Stars (21 million, 5.0/12 in 18-49 age group) had the evening’s largest audience and demos.
• Both How I Met Your Mother (8.9 million, 3.4/9) and The Big Bang Theory (9.7 million, 3.8/9) increased from last week.
• A 2-hour Prison Break (3.4/8) drew in 7.8 million.
• Chuck (7.6 million, 3.2/8) gained about a 1/2 million from last Monday.

9pm

• Samantha Who? (18.3 million, 5.0/11 in 18-49 demo) had the hour’s most viewers.
• Both Two and a Half Men (14.1 million, 5.0/12) and Rules of Engagement (11 million, 4.0/9) remained steady.
• Heroes (9.8 million, 4.9/11) was down over 500,000 from last week.

10pm

• CSI: Miami (14.1 million, 4.4/11 in 18-49) as the hour’s largest draw.
• The Bachelor (10.8 million, 3.9/10) was even with last week.
• Journeyman (5.2 million, 2.1/6) dropped another 700,000.