Discovery’s in-house production company Exploration Production Inc is bringing back Nerve Centre for a third season with a slightly new format.

The third season will kick off tonight (June 26) with a two-hour premiere of back-to-back episodes, the first showing TSN’s staging of the 100th annual Grey Cup (8 p.m. ET/9 p.m. PT) followed by an episode showing the lead-up to the first day of the new Four Seasons hotel in Toronto’s Yorkville (9 p.m. ET/10 p.m. PT).

The first season’s six episodes reached nearly 6 million viewers, and sold to nearly 140 markets globally while the second season’s numbers totaled almost 4 million.

The third season, however, features an expanded format that goes behind-the-scenes of the high-pressure, vital hubs the series has previously showcased.

While much of the technology remains the same, the “editorial vision” has evolved, says executive producer Kathryn Oughtred.

“In the past it was framed around a 24-hour clock which actually excluded types of venues and events,” Oughtred tells Playback. “We wanted to open it up and give viewers a greater chance at more depth, more excitement and a more varied type of venue.”

The premier episode shows the week of preparation that went into the Grey Cup, from contractors climbing into the stadium’s rafters to attach cables to  200 technicians  finding a way to convert the Rogers Centre into a full HD, live television broadcast studio

The Nerve Centre crew spent close to a month filming at the Four Seasons, before the opening in October 2012 of the chain’s flagship. The episode will feature general manager Dimitrios Zarikos as the human nerve centre for the 400 staff members.

Four more episodes will reveal the inner workings of Legal Sea Foods, Cedar Point Amusement, Barrett Jackson Collector Car Auction and Monster Jam with premier dates to be announced.