Heading down the rabbit hole…
Qwikiverse maps the references between stories: what Weeds nods to, and what nods back. How it works
http://thetvmanifesto.files.wordpress.com/2009/07/weeds_logo_leaf_k1.jpg File:Weeds logo leaf k1.jpeg
Fair use
Nothing spotted here yet.
A line quoted, a cameo, a character named after something: if Weeds nods to another story, or another story nods to it, spot the first one.