Watch Pretty Little Liars Online: Watch full length episodes, video clips, highlights and more. FILTER BY SOURCE. All Free (17); All Paid (); Amazon Prime. Pretty Little Liars season 7 is almost at an end, so what happens next? Here's how you can watch season 7, episode 19 live, on TV and online. Does anyone know where I can watch Pretty Little Liars online?! posted 3 years ago Its like $8 a month and I'm pretty sure they give you a free trial. Helpful (1). S7E18 "Choose Or Lose" Trailer. Season 1, Episode 8: New Guys, New Lies Full Episode S 6: I'm a Good Girl, I Am. IMDbOfficial Websitem3tv.