Fully-equipped with a hairnet and white coat with 'Mark' embroidered on the left breast, This Hour has 22 Minute's Mark Critch gets an insider's look at creating the tried and true Canuck beverage  — a cup of Tim Hortons coffee.

Critch travels to Ancaster for a tour and taste testing at the Tim Horton's roasting facility. His caffeine-induced report airs on 22 Minutes Tuesday.

Critch gets a lesson in coffee geography, how to roast a popular blend and what 'gustation' means.

Watch a sneak peek here on CBC Hamilton and tune into CBC television March 5 at 8 p.m. for the full story.