McKinley High School’s Glee Club is hotter than ever, bringing in 2.1 million viewers Tuesday on Global after a four-month hiatus.

It was the most-watched episode of the breakout series, which aired in simulcast in a new timeslot at 9:30 p.m. Fox moved the musical comedy back a day from its fall slot to air after American Idol‘s performance episode, and Global followed suit. (All numbers 2+ unless otherwise indicated.)

In Canada, Glee beat CTV’s Idol in the key 18-to-49 demographic by 21%. It follows a massive marketing campaign that included on-air spots, high visibility digital boards, print and internet ads and an all-day promotion event on a Toronto radio station dubbed GLEE-FM.

In the US, Glee nearly doubled its audience upon its return to Fox with 13.7 million viewers, according to Reuters. Glee will settle into its regular Tuesday 9 p.m. slot next week after NCIS on Global.

Meanwhile, Global’s House played second fiddle to CTV’s comedy lineup on Monday, with The Big Bang Theory nabbing 2.5 million viewers to win the night over the veteran medical drama (2.1 million). Big Bang‘s lead-in Two and a Half Men delivered 2.2 million viewers, according to CTV.

But ratings continue to dip below the one million mark for CTV homegrown comedies Hiccups at 8 p.m. with 772,000, followed by Dan For Mayor with 567,000 viewers. It was also a tough night for CBC’s new comedy series 18 to Life, which saw its season come to an end with 481,000 viewers at 8 p.m., below the season average of 607,000.

The comedies aired in part opposite the Toronto Blue Jays home opener on Rogers Sportsnet, which kicked off the season with an average 766,000 viewers. The PPM-inflated number was up significantly from last year’s home opener (440,000) and the Jays’ 2009 season average (339,000 viewers).

From Playback Daily