Was or wasn't Hathaway was used cleverly. I thought midway there's going to be a big surprise ending and Hathaway's leaning won't be used as a crutch. It had to go that way for future episodes and I was right. It would of been a huge disappointment if Hathaway's leaning was incorporated in the ending villain reveal.
Accommodating to the script that a trained always suspicious except here detective like Hathaway totally drops his guard with Rachael Stirling as Zoë Kenneth. Looking at Zoe she was once a man a bit ridiculous but witty writing. Comical that the fire was so slow moving especially started with an accelerant. Lewis totes a 200+ lb unconscious man over his shoulder not overcome by smoke or heat that the fire makes a perfect path for him. Outside looking from the street the fire explosion was very well done and realistic.
Story though a touch plodding picked up steam and had interesting characters. The ending though very wild was stellar.