The Flash - 'Flash of Two Worlds'

It takes a lot of work to pull off that hat.

Jay Garrick makes his pitch: He's the Flash from another world who fell through a breach created by the singularity during a battle with his nemesis, Zomm. In the process he lost his access to the speed force. Many are swayed, especially when a stealth polygraph confirms he's telling the truth and Caitlin confirms that he is a) still showing signs of accelerated healing and reduced heart rate and b) a bit fine. Barry is suspicious, however, and refuses to trust, even when Jay warns him that the latest villain to call him out is a man from his world, known as Sand Demon (Cisco is put out to have metahumans who already have their names) whose body disperses into sand-like particles.

Also having some trust issues is Joe, who isn't sure why perky patrol officer Patty Spivot wants on the anti-metahuman taskforce just as everyone else is quitting. Spivot has almost metahuman levels of pep and combines excellent technical police work with science cred (she admits to reading Barry's CSI reports for fun,) and is nerdy enough to hit it off with Barry, so she's either here to stay or evil. She gets a big tick in the pro column by getting kidnapped by Sand Demon.

Iris convinces Barry to move past the damage Harrison Wells/Eobard Thawne did to his ability to trust and work with Jay. This - with some help from Cisco's newly discovered ability to perceive past events - lets them track Sand Demon and confront him, with Jay teaching Barry to shoot lightning and then acting as a distraction while he frees Patty. Then Barry...

Okay, so for the second week running, Team Flash come up with a plan that doesn't just result in the death of the villain, but goes in with the specific intent of horribly killing them. This is even more of a hurdle for me than the Pipeline.

Joe accepts Patty onto the taskforce when he finds out her father was murdered by one of the Mardon brothers pre-powers. Consequently, she feels that someone needs to be acting against the bad people who have now got metahuman abilities. Stein and Cisco develop a tracker which reveals fifty-two dimensional breaches, including a whopping one right under STAR Labs, and Stein confronts Cisco about his gift, agreeing to keep it quiet for the time being. Finally, we see Earth-2's STAR Labs, and its founder, Harrison Wells.

Wells casts a long shadow this episode, and not just with Barry's trust issues. Cisco's reaction to his powers is coloured by the fact that Wells claimed they were a gift from him, and everything Wells did was evil in Cisco's eyes. Whether Earth-2 Wells is also actually Thawne and thus Zoom, or the real Wells or what remains to be seen, but I have no doubt he'll have some impact on Earth-1.