By Montykins
Watson spends most of this episode trying to get Holmes a sponsor so she can leave him in a few weeks. This is an interesting plot not because there's any chance that Watson will leave but because it will be fun to see what the show will do to keep her around. Holmes rejects her first recommendation because he's a boring guy who spouts platitudes. So he goes with a car thief who seems like he could actually be a pretty good fit. He's got patience, which will come in handy.
The mystery of the week involves a bomb. It blows up in an air vent, killing two people at one of those cool web design firms where people ride skateboards indoors and carry around Nerf basketballs. The bomb was triggered by a pager that was called by a guy with a history of arson. But he was just trying to call his local deli, which has a phone number one digit off.
So Holmes investigates further and establishes that the bomb was actually four years old, so it was probably meant for the occupants of the space. This turns out to be a company full of spin doctors (the political kind, not the jam-band kind) led by Lisa Edelstein. So she left House so she could deal with a more direct version of Sherlock Holmes? The first suspect is a bomb-maker for an extreme environmental group, but this turns out to be the only bomb he didn't make. The second suspect is a guy who got into a fight four years earlier and vanished, but he turns up entombed in a wall in his house.
However, he leads them to a safety deposit box that contains a taped-over VHS copy of Cheech and Chong's Movie. And instead of containing hilarious marijuana-based jokes, it has an old recording of Young Lisa Edelstein being a prostitute. So it turns out that she built her company on money that she got from hooking, and then she was blackmailed much later. And her pipe bomb didn't work so she shot her blackmailer instead. The end!