Series 4, Episode 2
With all the guff about getting Barry out of the Speed Force and the speed madness and such out of the way, this episode -- a forty-two minute long comedy about relationships, communication, and technology -- is the first real test of The Flash's writing staff insistence that this series will be much lighter and fluffier than the two preceding it. It's the point where they have to prove that not only can they do that, but that they can do it well.
When Kilg%re, a metahuman with the power to control technology via a bio-digital computer virus, starts killing off wealthy tech moguls, Barry and Iris are given their first chance to test out the new Team Flash dynamic. Barry's over-enthusiasm and his unwillingness to listen to Iris, either on the job or in their relationship, swiftly causes problems, however, resulting in Iris insisting on taking Barry to several awkward sessions of couples counselling. Meanwhile, Cisco, wrapped up in figuring out a way to stop Kilg%re, misses a date with Gypsy, earning her ire -- since on Earth-19, the day is 111 Day, their equivalent of Valentine's Day.