Political opinion and analysis outside the mainstream rarely are found on television talk shows, and it might be thought that this state of affairs is a product of the political agenda of the television stations themselves.
Conclusion
Opinions and analyses on talk shows are typically bland and innocuous.
Intermediate Conclusion
The tv stations that air these talk shows only air shows that will appeal to large numbers of people.
Premise
The tv stations that air these talk shows are trying to get the largest possible share of audience for their shows.
Evaluate
The last two sentences go Because [claim 1], [claim 2]. As a result, [claim 3].
claim 1 → claim 2 → claim 3
In going from claim 1 to claim 2, we seem to be assuming that .
In going from claim 2 to claim 3, we seem to be assuming that
Goal
Look for an answer connecting "want largest share" to "only air shows appealing to large numbers", or an answer connecting "only air shows appealing to large numbers" to "typically only have bland/innocuous opinions".