This Wednesday, CTV’s new sitcom Jann reached 586,000 viewers in overnight estimates. That’s a healthy jump from 441,000 the week before and the show’s second highest overnight outcome yet. So far, Jann has gone 768,000, 526,000, 441,000 and now 586,000. Wednesday’s episode featured Jann Arden’s old pal Rick Mercer as a guest star, plus a