Gotham - Rogues' Gallery: Returning with a double-episode, feature-sized story, Gotham came out swinging, showing us what it does best: gangster politics and a supervillain du jour for Gordon and Bullock to track down.
While Fish finally made her play to take control of 'The Family' away from Don Falcone, Gordon's stint as a guard at Arkham Asylum came to an abrupt end when The Electrocutioner aka Jack Gruber (the ever-menacing Christopher Heyerdahl from Hell On Wheels) escaped with one of his fellow whack-jobs and embarked on a wave of revenge killings against those he blamed for double-crossing him in an earlier life.
Firefly's Morena Baccarin popped up as Dr Leslie Thompkins, a seemingly more stable love interest for Jim, while his ex, Barbara, was bounced from her new lover's bed back to her parents' posh estate - much to their obvious discomfort.
Selina and Ivy put in a token appearance and have adopted Jim's old flat as their squat - with Ivy managing to piss Barbara off when she rang looking for Jim.
However, there was no sign of young Bruce Wayne (or Alfred) in Rogues' Gallery and, while I was warming up to them as the first half of the season developed, they weren't missed in the slightest.
Arrow - Nanda Parbat: Ra's Al Ghul, Nanda Parbat and our first decent look at The Atom! This show is fast becoming as big a vehicle for fan-service as The Flash.
Yet another great episode from the (currently) consistently strong Arrow saw Thea unable to keep her secret and letting Laurel know who really killed Sara, before she turns round and sells out her own father, Malcolm Merlyn, to The League (presumably she found their contact details in an online directory of evil organisations).
The League kidnap Merlyn, but in the process Oli captures Nyssa Al Ghul, with the aim of getting the location of Nanda Parbat out of her. This struck me as odd, as didn't Oli found his way there quite easily in the mid-season finale, The Climb, when he faced Ra's in a duel to the death?
Anyway, Oli and Diggle head to Nanda Parbat to rescue Merlyn, so Thea doesn't have to live with his death on her conscience. Of course, this is Ra's Al Ghul we're talking about, so our heroes end up walking straight into a trap. And an unexpected offer for Oliver.
Meanwhile back in Starling City, Felicity and Ray finally get it on before he puts the finishing touches to his powered suit and becomes the Arrow-verse's answer to Iron Man. I don't see any shrinking power though and it's shrinking that I associate with Ray Palmer and The Atom.
Spoilerific Previews Of What's Coming In The Flash and Arrow: