Episode 5.16/5.17 - The Incident - Ratings are in

Source: TV by the Numbers

Here is ABC's press release
"Lost: A Journey in Time" (8:00-9:00 p.m.)
ABC's "Lost: A Journey in Time" clip show held second in the 8:00 p.m. hour among Adults 18-49 (2.4/7), besting CBS' original comedies ("Rules of Engagement"/"Old Christine") by 26% (1.9/6) and NBC's original "Law & Order: Criminal Intent" by 100% (1.2/4). The clip show ranked No. 1 in the hour with Men 18-34 (1.7/6-tie).

"Lost" (9:00-11:00 p.m.)
On its fifth-season finale, ABC's "Lost" paced a strong second to "American Idol" during the 9 o'clock hour among Adults 18-49, beating out its original CBS drama competition by 26% (4.3/11 vs. 3.4/8 - "Criminal Minds"). Moving up to a dominant No. 1 from 10:00-11:00 p.m., "Lost" (4.3/12) defeated second-place CBS' original "CSI: NY" by 34% (4.3/12 vs. 3.2/8) and NBC's original "Law & Order" by 95% (2.2/6).

* "Lost" registered as Wednesday's No. 1 scripted TV show for its 15th consecutive regular original telecast in the key Adult 18-49 sales demographic.

* Despite competing against the penultimate episode of "Idol," "Lost" marked the series' strongest performance since the beginning of April among viewers (9.3 million) and young adults (4.3/11) - since 4/1/09. In addition, Lost generated ABC's 3rd-highest Adult 18-49 rating in the Wednesday 9-11pm time period this season.

Source: ABC