Dirty John, starring Eric Bana and Connie Britton, is an eight-part true crime anthology series based on the Los Angeles Times podcast of the same name. This sexy, provocative and harrowing real-life thriller follows the true events of an online dating relationship turned dangerous that rocked headlines and shocked the world.

After only two months of meeting one another, Debra Newell (Britton) is lured into marriage by handsome and romantic charmer John Meehan (Bana) in an attempt to steal her money.

But Debra's two daughters suss John's motives out, resulting in the con artist having to deepen his web of lies.

There's a 50 Shades/You vibe to it:

Seán's Telly then takes a look at Channel 4's disturbing documentary Training Teachers To Kill, which airs @9pm tonight. Kira Phillips delves into the world of gun violence and school shootings in the US to see if arming staff is the way forward.

There's also the final episode of Sharon Horgan and Rob Delaney's comedy show Catastrophe, which includes an emotional tribute to the late Carrie Fisher. Fisher played Delaney's 'awful' mother in the first three series.

And the Movie of the Week is this little gem:

Check out Seán's recommendations in full by pressing the play button on the screen.