Eureka (Syfy): Ratings Recap

'Eureka' premiered on Sci-Fi network July 18, 2006 and ranked as one of the top-viewed programs of the week (a rare feat for that network) with 4.05 million viewers and a 1.3 A18-49 rating. It was unable to sustain those number though, falling to 2.5 million by week 2 and remaining slightly below that for the remainder of the season (average: 2.48 million). A second season dipped further, averaging just over 2.1 million viewers, but the third season was able to recover up to over 2.3 million; both logged a 0.8 in the 18-49 demo. Ratings remained OK in its fourth season, pulling a 0.7 & 2 million viewers, but tumbled to 0.5 & 1.6 million in its fifth season and it was cancelled.

Eureka Season 1 Ratings (2006)
Episode Date	Viewers (millions)	18-49 rating
Jul. 18, 2006	4.053	1.3
Jul. 25, 2006	2.491	0.8
Aug. 1, 2006	2.621	1.0
Aug. 8, 2006	2.251	0.7
Aug. 15, 2006	2.326	0.7
Aug. 22, 2006	2.336	0.8
Aug. 29, 2006	2.403	0.8
Sept. 5, 2006	2.302	0.8
Sept. 12, 2006	2.579	1.0
Sept. 19, 2006	1.714	0.7
Sept. 26, 2006	2.272	0.8
Oct. 3, 2006	2.363	0.9
Average	2.476	0.9

Eureka Season 2 Ratings (2007)
Episode Date	Viewers (millions)	18-49 rating
Jul. 10, 2007	2.554	1.0/3
Jul. 17, 2007	2.195	0.8/2
Jul. 24, 2007	2.100	0.8/2
Jul. 31, 2007	2.030	0.7/2
Aug. 7, 2007	1.808	0.7
Aug. 14, 2007	2.211	0.8
Aug. 21, 2007	2.307	0.8/2
Aug. 28, 2007	2.283	0.9
Sept. 4, 2007	1.868	0.6
Sept. 11, 2007	2.305	0.8
Sept. 18, 2007	2.440	0.9
Sept. 25, 2007	1.538	0.6/1
Oct. 2, 2007	1.874	0.8
Average	2.116	0.8

Eureka Season 3 Ratings (2008-09)
Episode Date	Viewers (millions)	18-49 rating
Jul. 29, 2008	2.808	1.0
Aug. 5, 2008	2.495	0.8
Aug. 12, 2008	2.432	1.0
Aug. 19, 2008	2.419	0.9
Aug. 26, 2008	2.481	0.8
Sept. 9, 2008	1.977	0.6
Sept. 16, 2008	2.146	0.7
Sept. 23, 2008	1.968	0.6
Jul. 10, 2009	2.584	0.8
Jul. 17, 2009	2.675	0.8
Jul. 24, 2009	2.410	0.7
Jul. 31, 2009	2.527	0.8
Aug. 7, 2009	2.353	0.7
Aug. 14, 2009	2.219	0.7
Aug. 21, 2009	1.989	0.6
Aug. 28, 2009	2.060	0.6
Sept. 11, 2009	2.377	0.8
Sept. 18, 2009	2.297	0.8
Average	2.345	0.8

Eureka Season 4 Ratings (2010-11)
Episode Date	Viewers (millions)	18-49 rating
Jul. 9, 2010	2.520	0.8
Jul. 16, 2010	2.209	0.6
Jul. 23, 2010	2.293	0.7
Jul. 30, 2010	2.272	0.7
Aug. 6, 2010	2.562	0.8
Aug. 13, 2010	2.520	0.8
Aug. 20, 2010	2.299	0.7
Aug. 27, 2010	2.438	0.8
Sept. 10, 2010	2.250	0.7
Dec. 7, 2010	1.919	0.6
Jul. 11, 2011	2.016	0.7
Jul. 18, 2011	2.162	0.8
Jul. 25, 2011	1.768	0.6
Aug. 1, 2011	2.134	0.7
Aug. 8, 2011	2.248	0.7
Aug. 15, 2011	2.230	0.7
Aug. 22, 2011	2.032	0.7
Aug. 29, 2011	2.130	0.7
Sept. 12, 2011	1.927	0.7
Sept. 19, 2011	1.871	0.7
Dec. 6, 2011	1.399	0.4
Average	1.990	0.7

Eureka Season 5 Ratings (2012)
Episode Date	Viewers (millions)	18-49 rating
Apr. 16, 2012	1.808	0.6
Apr. 23, 2012	1.589	0.5
Apr. 30, 2012	1.473	0.5
May 7, 2012	1.446	0.6
May 14, 2012	1.486	0.5
May 21, 2012	1.624	0.4
Jun. 4, 2012	1.966	0.6
Jun. 11, 2012	1.454	0.4
Jun. 18, 2012	1.592	0.5
Jun. 25, 2012	1.613	0.5
Jul. 2, 2012	1.588	0.5
Jul. 9, 2012	1.496	0.6
Jul. 16, 2012	1.565	0.6
Average	1.590	0.5

Source: Nielsen Media Research