So You Think You Can Dance Canada begins the competition phase of its fourth season with the top 22 performing—the top 22, of course- being the gimmick the show has used for two seasons now to distinguish itself from its American counterpart “because we have too many good dancers here.” (Which, once one hits the performance rounds, never seems to be the case, but there you go.) This year’s 22 are a more-diversely skilled lot than last year’s: five ballroomers, five hip-hoppers, and the balance technically-trained dancers, which puts the Canadian show in sharp relief against the American, and good on them for that. The show works best when its dancers are diverse. (CTV, 8 p.m.)