Has the tide gone down for CBS at 10:00? For the first time since its debut, Hawaii Five-0 was bested by Castle in the hour. ABC’s victory in that time slot helped the network take another double win (viewers and demos) on Monday.

8pm

• Dancing with the Stars (19.8 million, 4.1/10 in 18-49) was down slightly.
• House (9.5 million, 3.6/10) lost 1 million.
• How I Met Your Mother (8.5 million, 3.4/9) did about the same.
• Rules of Engagement (8 million, 3.0/8) gave up 500,000.
• Chuck (5.3 million, 1.9/5) was on par with last Monday.
• 90210 (1.8 million, 0/9/2) was off by 100,000.

9pm

• Two and a Half Men (13.2 million, 4.3/10 in 18-49) fell by 1 million.
• Mike & Molly (10.8 million, 3.5/9) lost 1.5 million.
• The Event (6.5 million, 2.2/5) trimmed off 1 million.
• Lie to Me (5.5 million, 1.9/5) was down 500,000.
• Gossip Girl (1.8 million, 09/2) matched 90210’s numbers.

10pm

• Castle (12.1 million, 3.2/8 in 18-49) picked up 200,000.
• Hawaii Five-0 (10.5 million, 3.1/8) slipped by 1.5 million.
• Chase (5 million, 1.5/4) shrunk by 800,000.

(You can review last Monday’s ratings here.)