Over 5.3 million viewers watched Garrow's Law's triumphant return to Sunday nights on BBC One. And the show was also a hit with the critics, the Guardian's Sam Wollaston writing,
"William Garrow is my new hero. If the law was an ass (and it certainly was), then he whupped it, big time. The only pity is that, just as the last one was, this series is lamentably short. Just three more episodes to go".