The Mentalist has been a bit of a surprise hit tv series. If you want to watch it online then here are a few options (we checked these as recently as December 2018):

 

Just cancel before the 30 days is up and you don’t pay a penny, simple. If you’re wanting to watch The Mentalist for free and in high quality right now, then a free trial with Amazon Video is your best option. 

Other options you could try (note – we cannot confirm if these will work, they are just suggestions):

  • PopcornFlix
  • Flixtor 
  • Putlocker – has some streams of The Mentalist that are low quality

Hopefully this information will help you watch The Mentalist online free. It’s a great series and is worth watching in high quality if possible.