He was probably helping Rachel and the other Americans "in charge" find/remote locate the Red Centers in Gilead.

How come a Mr Iyengar spoke Hindi and not Tamil?

Excellent deduction. Also, he works for CBS.

They did that once before too. Season 1, ep 1 - right at the end of the pilot. Someone (not me!) wrote about it in detail here: http://www.baseballprospect…

And the stretch of graffiti-ed tunnel where they found the UPS boxes dumped - wasn't that the same tunnel where the two police officers were murdered in the Season 2 episode with Natalie Dormer - the one with the kid's kidnapping?

an article of clothing belonging to a reeeeally well-endowed woman?