Only problem - hasn't Indra been shown using his Vajra before this, or was it always his sword?
Also, in the episode a few days ago, didn't they show Twastha go back and awaken Vritrasura? But what's the difference b/w this Vritrasura, and the Vritra they showed earlier, who had entered Sati, and later the services of Tarakasura? Did he after Takis death join Kumbhakarna in a nap, and is just waking up now to be of service to Jalandhar?
Yeah, I too thought that Dadhichi would be immortal, since Indra's brush w/ Trishiras/Twastha/Vritra came long before that, probably in Sati's era. Incidentally, in one account, the way Indra killed Trisiras was not while he was meditating, but while he dedicated the yagna offerings to the devas for the welfare of the asuras. Now, that would be totally justified since what Trishiras did there was pure treachery.