The Flash - 'Fast Lane'

This is a relationship that isn't ever going to go sour.

While Joe and Iris work on their relationship with Wally - Joe by pretending the street racing isn't happening, Iris by being all hard-nosed - a new meta hits the streets: Tar Pit is a former petty criminal who had a falling out with his partners after their big score and got dropped into a vat of tar right when the accelerator went up. Given the power to transform into boiling tar, he goes after his former buddies with revenge on his mind, and when Flash goes out to stop him he finds his speed mysteriously reduced.

It turns out that Harry has used his terminal examination of the Turtle to create a speed drainer and already drawn off some of Barry's Speed Force, with the accompanying cellular damage. While they work together on the breach problem, Harry even warns Barry that he will betray him to save his daughter. This is hard for Barry to hear, however, as he is just starting to warm up to Earth-2 Wells as a possible replacement mentor.

Lot of big metas this season.

Things come to a head when Tar Pit attacks a street race organised by one of his old crew and the Flash is too slow to prevent Iris being hurt. To everyone's surprise - not least his own - Harry confesses his guilt and asks to be sent home to face Zoom on his own. Once Tar Pit is defeated, however, Barry gives the team a pep talk in which he points out that there isn't one of them that wouldn't have made the same call as Harry to protect their family. As a team, therefore, they opt to go with Harry to Earth-2, which sounds like it's going to be a hell of a lot of fun.

I am in fact super-psyched that The Flash has short cut what looked like becoming a long and fairly miserable betrayal storyline watching the Flash get slower and sicker, in favour of a glorious charge across the dimensions. It's why I like The Flash more than Arrow after all; it's just always been more fun.