When it comes to viewership, Sunday's "The Strain" was the worst performer to date. It nonetheless remains a strong addition to FX's schedule.

After bucking the typical drama trend by avoiding a decline in week three and then enjoying an uptick in week four, FX’s “The Strain” slipped to an overall ratings low for its fifth episode.

While its 1.0 adults 18-49 rating matched that posted by the series’ second and third episodes, the fifth installment’s viewership average of 2.03 million is the lowest on record.

Both numbers are down from those posted by last week’s broadcast, which drew a 1.2 rating with 2.27 million viewers.

That drop does not, however, change the fact that “The Strain” is performing well for FX. Performing twice as well as fellow newcomer “Tyrant,” which is itself consistently outperforming sophomore drama “The Bridge,” the buzzworthy “Strain” has clearly established itself as an asset for the cable network.