The episode actually did very well. According to an ABC Family press release, Pretty Little Liars was the #1 scripted TV telecast for women 18-34, viewers 12-34 and females 12-34 on Monday.
Most importantly, according to TV by the Numbers the show maintained a 1.3 in the key adults 18-49 demo — which is a good sign, because shows normally lose viewers after big premieres, and more shows were new this week.
Keep watching, little lairs!
Be sure to tune in for the next episode of Pretty Little Liars on Monday, January 16 at 8 pm ET/PT on ABC Family.