Let's get this out of the way.

The opening theme is justly famed. It’s implacable. It’s relentless. It has a certain swagger, too - but then those strings come in like birds of prey, keening, dissonant. All is lost! But no; Perry’s theme reasserts itself.

These are the opening credits for the first season. Perry gets something from the judge, and smiles; it’s all fallen perfectly into place. Man, he loves his job. He passes the file off to the rest of the cast; apparently in the first season, it was not only standard procedure for the defense and the prosecution to sit at the same table, but share notes on the case.