Newly found sibling; A mysterious address; Into the sewers. [CW: Weird toilet humor]
Beatdown City -- Darren Curtis; Schoolyard Spy -- Darren Curtis; Checking inventory -- Jonathan Shaw; Canyon -- Presence of Music; City of Duisburg (Ambient) -- One Man Symphony, CCBY4.0
Here are some great episodes to start with. The bonus episode listed here is mostly standalone, if you're not quite ready for the main campaign.