Also checkout the Bokaro shatabdi series of Mani Vijay sir
That's series is just a treasure for ER lovers.
ER in the 2000s can be seen in that series like construction of 3rd line in Hwh bwn section, saraighat exp with just 1 ac coach and non vestibuled coaches, poorva exp with a typical cream-brown mixed livery and running with diesel loco, direct bifurcation of bwn-bdc mainline from HBC without any flyover, low level pfs of many stations and many more