Short answers, pulled from the story.
TSN launched on the 1st of September, 1984, founded by the Labatt Brewing Company as one of the first Canadian specialty cable channels. It was licensed by the CRTC on the 2nd of April, 1984, under the original name Action Canada Sports Network, and was established under the leadership of Gordon Craig, a former CBC Sports employee.
TSN is owned by CTV Specialty Television, a joint venture of Bell Media, which holds an 80 percent share, and ESPN, LLC, which holds a 20 percent share. Bell Media became the majority owner after acquiring 100 percent of CTVglobemedia's broadcasting arm in a deal that closed on the 1st of April, 2011.
In November 2013, Rogers Communications announced a 12-year deal to become the sole national television rightsholder of the NHL in Canada, beginning in the 2014-15 season. TSN had held national cable rights from 1987 to 1998, and again from 2002 to 2014. TSN had previously attempted to secure a similar exclusive deal in 2006, offering $1.4 billion over ten years, but was unsuccessful.
TSN acquired broadcast rights to the IIHF World Junior Championship from CBC in 1990 and has broadcast it annually since 1992. TSN's coverage, combined with the aftermath of the Punch-up in Piestany incident and strong Canadian performances in the mid-1990s, helped establish the tournament as a traditional holiday-season event in Canada. TSN gradually expanded from covering only Team Canada games to broadcasting every pre-tournament and in-tournament game by the 2021 Championships.
TSN currently operates five main channels. TSN1 is the primary feed for British Columbia, Alberta, and Yukon. TSN2 serves as a national overflow channel and carries Montreal Canadiens regional broadcasts. TSN3 is the primary feed for Manitoba, Saskatchewan, the Northwest Territories, Nunavut, and northwestern Ontario. TSN4 covers most of Ontario, and TSN5 covers eastern Ontario, Quebec, and Atlantic Canada. TSN also operates a part-time 4K feed that launched on the 20th of January, 2016.
TSN became one of the first two specialty television services in Canada available in high definition on the 15th of August, 2003. Its first live HD broadcast was a Canadian Football League game between the Montreal Alouettes and Hamilton Tiger-Cats, which was delayed by one day from its originally scheduled date due to a major electrical power failure.