Dr. Engley is an intelligent man and an invaluable, moderate source for this series. It is nice that when we are compiling a series that will air in mid-Missouri to have a local doctor, an individual who spent a significant part of his career in Columbia, as one of the scientific sources. Personally, I appreciated Dr. Engley's explanation of the history of thimerosal, because it allowed me to set some jumbled knowledge into context. Each source that we interview for this series is another voice in this debate and another piece to the puzzle. I can only hope that when all of the pieces are put together, we have a more complete picture of autism than the one we initially held.