Both series premieres follow the Season 4 debut of HBO’s "Game of Thrones."
Innovative reality app sees collaboration of five media giants.
More than 400,000 viewers tune in to watch Matthew McConaughey and Woody Harrelson.
Season 4 premieres on Sunday, April 6th.
Touring event will make stops in Toronto and Vancouver.
"Sarah Silverman: We Are Miracles" is the first HBO comedy special for the Emmy award-winning actress.