In his popular TV series Rescue Me, Denis Leary portrays the tall, tough and troubled firefighter Tommy Gavin. In actuality, Leary is also tall and tough but a real softie when it comes to the men who work out of the nation’s firehouses. Leary, previously known as a stand-up comedian, is the co-creator of the FX show and is involved in every aspect. It’s earned him an Emmy nomination for writing and a Golden Globe nomination for acting. “All the stories are from real life,” he said. When we spoke, they were booting up for a third season, which starts...