After last week's slightly underwhelming episode, The Edge Of Mystery was a highly-charged return to the glory that we expect from Agent Carter.
Jarvis is in pieces at the bedside of his wife, hospitalised after being shot by Whitney Frost during the kidnapping of Jason Wilkes.
It turns out that Whitney wants Jason so they can compare notes - physicist to physicist - of their zero matter-powered abilities, but she's still keen to get her hands on the uranium rods to re-enact the initial atom bomb test that opened the rift in reality and allowed zero matter in.
Wanting to rescue Wilkes, Peggy cooks up a scheme with fake rods to exchange with Whitney, only the ruse is quickly rumbled and it turns out that Wilkes isn't so interested now in being rescued.
Meanwhile, Jack Thompson is tracking down documents to discredit Peggy, at the behest of Vernon Masters, but eventually comes to realise that maybe Masters is up to no good - when he overhears Masters and Frost conspiring to steal the real uranium rods from the SSR.
A fantastic blend of period spy-fi and weird science, The Edge Of Mystery was a fine showcase for everything that makes Agent Carter such a unique show, and very much a key element of the Marvel Cinematic Universe.
There was a slight sense of deux ex machina that the plans for the 'gamma cannon' came through from Howard Stark at exactly the right moment for Peggy's latest plan to take on Whitney, but it wasn't quite as jarring as the timing issues in Monsters.
The powers of Whitney and Wilkes are continuing to grow and I can't wait to see what they can do now, now that Wilkes has received another massive intake of zero matter.
And major kudos to James D'Arcy for his wholly convincing portrayal of the grief-stricken and revenge-driven Edwin Jarvis, not willing to give Whitney Frost the benefit of due process and going all Frank Castle on her.