Water cleanliness and proper sanitation are non-negotiables.

In this one, Ian and Liv take it back to the 1800s, where a public water pump was a vessel of disease for the working class folks of London. Cholera, typhoid fever, dysentery, and a myriad of other bacterial diseases were spreading like wild fire, and it wouldn't be a true 1800's nightmare without the Men in Charge of All the Things (London Chapter) denying the claims of the scientists.

Also, Liv starts a new band. Ian begins panicking over moving in two weeks.