It's definitely not any sort of coincidence in that case, "House" was explicitly Holmes and Watson (House and Wilson? It's even in the name...)
Originally Posted by gkelly
And I think it's pretty clear what the exchange with Molly at the end was about. Two things: 1. I can't think of anyone else to set up the fake "Mrs. Hudson's been shot" call to get Watson out of there and 2.
Molly's a pathologist/M.E. Sherlock needs to be dead to the world CONVINCINGLY. Who better to help? Notice that when John runs for him before being knocked down by the cyclist, there's a laundry cart between him and Sherlock, when he recovers and reaches the body, it's gone. I bet Molly helped him pull off the switch and 'identified' the remains.