Casting Roundup: New Warbler Means Trouble for Kurt and Blaine on ‘Glee’ & More

Grant GustinIf you caught last night’s episode of Glee, you already know that there’s some trouble brewing between Kurt Hummel (Chris Colfer) and Blaine Anderson (Darren Criss). For all those hoping for a speedy recovery of their cherished relationship: avert your eyes right now. Things are about to get worse. Theater actor Grant Gustin will join the cast as Kurt’s rival for Blaine’s affections. Reportedly, Grant’s character, Sebastian, will be no gentleman in pursuing Blaine, his former fellow Warbler. Sebastian is said to be a conniving, ruthless and promiscuous predator who is very much the anti-Kurt. We will first see Sebastian in the fifth episode of the season. Glee airs Tuesday nights at 8 p.m. ET/PT on Fox. –TVLine

It seems that Hawaii Five-0 guest star Terry O’Quinn has been so well-received that he’s starting to warrant his own slew of backstory guest stars. In one of the most “Really?”-inducing castings of the season, Jimmy Buffett will be stepping onto the Hawaii Five-0 set. Buffett’s character will be an old war buddy of O’Quinn’s Lt. Commander Joe White who lends a hand to the Five-0 in a time of need. Hawaii Five-0 airs Mondays at 10 p.m. ET/PT on CBS. Buffett’s episode will air this November. –EW

Speaking of old LOST stars, Sonya Walger, who played Desmond’s unwavering lover, Penny, will guest star as a psychiatrist to the lead duo on the upcoming USA cop comedy Common Law. After law enforcement partners prove incapable of getting along, their captain assigns them mandatory “couple’s therapy.” Playing the pair’s shrink will be Walger — a perfect fit. After all, there’s only one thing these troubled guys need in their hectic lives: a constant. Common Law begins production in October and is shooting for a 2012 premiere. –EW

The final piece of casting news today leaves a lot to the imagination: comedian Dane Cook will be joining NBC with his own sitcom. We don’t know any specifics about the show, but if it’s a pointed satire of life’s idiosyncrasies delivered through short, artistic vignettes, then Cook had better gear up for some accusations about stealing ideas from Louie. Cook’s series is expected to debut during NBC’s 2012-13 season. –TVLine