Whistler premiered on
CTV on June 25, 2006, and on
The N in the United States on June 30, 2006. The show aired in Canada on Sunday nights at 10 pm local time until August 14 when CTV announced it was moving the series to Monday nights at 9 pm local time. However, after just one airing in that time slot, CTV returned the series to Sunday nights at 10 pm, effective with the August 20 telecast. CTV aired the final two episodes of season one back to back on Friday, August 25. From November 25, 2006, to February 3, 2007, CTV rebroadcast the series on Saturdays at 10 pm local time and Sunday afternoons at 4 pm local time. The CTV rebroadcast of the series pilot "Fallen" was an alternate version that included a slightly different opening scene, a different main title segment and some minor editing of a few other scenes. The N continued to air only one episode a week in the United States, eventually shifting the final five episodes to Saturday mornings at 1 am before completing the series on September 23. The station began re-airing the series on Monday, January 22, 2007, at 5 am but for unexplained reasons omitted airing the first episode "Fallen" and began with the second episode "Out of the Shadows". The series also aired on the British youth channel
Trouble beginning October 16, 2006, on Monday nights at 9 pm and on the Polish catholic channel Puls on Saturday and Sunday evenings at 6:20 pm. French-language broadcasts of Whistler aired from January 30 to April 29, 2007, on a Canadian cable channel, Séries Plus Tuesday nights at 8 pm. Season 2 began filming on January 8, 2007, and was completed on May 23, 2007. As with the first season, there were 13-second-season episodes. These were aired in Canada by CTV beginning on September 29, 2007, on Saturday nights at 9 pm and concluded on December 15, 2007. Repeats began on Saturday, December 28, 2007. The N was confirmed as a co-producer and American rights holder for the second season, but opted not to air it on its network for unknown reasons. Séries Plus in Canada began airing Season 2 in French on Wednesday nights at 8 pm beginning January 9, 2008.
Trouble began airing Season 2 on Sunday July 13, 2008, in a 6 pm and midnight timeslot with repeats the following Saturday. Bulgaria's TV7 aired a dubbed version of season 2 beginning on November 29, 2007, weekdays until December 13, 2007 (actually airing episodes 212 and 213 before they were broadcast in Canada). Ireland's national broadcaster RTÉ air Whistler on their second channel RTÉ 2 in the early hours of Saturday morning (around 3 am) MTV2 in Canada began airing season 1 on Friday, August 8 as part of its inaugural program schedule (the cable channel began broadcasting August 1). First airings of episodes are on Fridays with numerous repeats during the week. The channel continued into Season 2 immediately following the last airing of the Season 1 finale. Another CTV network, "A", began airing Season 1 on February 20, 2009, on Fridays at 10 pm local time. Season 2 began airing on "A" on Saturday, September 12, 2009 also at 10 pm local time. ==Episodes==