Here's where CBS says to find it:
Starting today, CBS will stream the four remaining original episodes of the prime-time drama SMITH on its broadband channel, innertube (www.cbs.com/innertube). The episodes will be available free of charge, with minimal commercial interruption, for four weeks. The first three episodes, which had already aired, will also return online so internet audiences can see all seven original episodes in their entirety. Also, a written synopsis of how the producers planned to resolve the serialized drama will be provided by the show's writers and posted on the series' website at www.CBS.com.
Additionally, Warner Bros. Television is making all seven episodes of SMITH available via digital download in November as well as AOL, Amazon and Apple's iTunes Store, so that viewers will be able see the four new original episodes or watch all seven. Fans will have the opportunity to see the series unfold and will have the satisfaction of knowing the intended resolution of the on-going plotlines.
SMITH premiered on the CBS Television Network on Tuesday, September 19th and ran for three episodes. The pilot and episodes two and three were streamed on innertube for one week immediately following their initial broadcasts on the Network.