This week: Vladimir Putin holds his yearly four-hour marathon Q&A session with the Russian public. Oklahoma volunteer deputy Robert Bates shoots black suspect Eric Harris. In preparation for Earth Day (it's in a week), they took a quick look at the plight of the polar bear; not only is their habitat shrinking, but pollution is threatening the species by weakening male polar bears' pelvic and penile bones. In studio we meet Marshmallow, the Polar Bear With A Broken Penis. And Now: The Most Patient Man On Television Endures The American Public. (That would be Steve Scully of C-SPAN's Washington Journal call-in show.) Main story: Abuses of the US Patent system. (YouTube 11m) And Now: The Continuing Adventures Of The Most Patient Man On Television. And finally, we return to CNN's infamous "end of world" video, with Last Week Tonight's own proposed version (YouTube 7m), narrated by Martin Sheen and featuring footage of an old-time Western saloon peopled by cats.