Arrow (8pm, CW) - A new drama about a billionaire playboy, Oliver Queen, who becomes a vigilante after being shipwrecked for five years on a remote island. In tonight's pilot, Oliver is rescued and creates the persona of Arrow, an expert archer determined to fight evil in his beloved city. Adrienne reviews.
Nature: Siberian Tiger Quest (8pm, UNC-TV) - In the Season 31 premiere, biolgist Chris Morgan travels to the forests of eastern Russia to meet wildlife filmmaker Sooyong Park, who recorded endangered Siberian tigers in their natural habitat.
Nova: Secrets of the Viking Sword (9pm, UNC-TV) - In the Season 40 premiere, the secrets behind the design and construction of the Vikings' Ulfberht sword, which was made between A.D. 800-1000.
Modern Family (9pm, ABC) - Two new episodes tonight. In the first, Lily's first day at kindergarten is marred by a scuffle with a little boy, which results in a confrontation for Mitchell and Cameron with the boy's lesbian parents. In the second episode, Phil goes in for a vasectomy, and Jay and Gloria debate the merits of learning their baby's gender. Why two episodes tonight? To give the best possible lead-in for ABC's new drama, "Nashville." Which you should totally watch.
Nashville (10pm, ABC) - In this excellent new ABC drama, country music legend Rayna (Connie Britton, right) fights to stay in the spotlight while a younger singer tries to usurp her power. In tonight's premiere episode, Rayna's record label asks her to open for the rising star, Juliette Barnes (Hayden Panettiere, right). Full review.
Chicago Fire (10pm, NBC) - From "Law & Order" creator Dick Wolf, a new drama following the firefighters, paramedics and rescue squad of Chicago Firehouse 51. Tonight, a fire claims the life of a team member, and firefighters point fingers at one another. Adrienne reviews.
Nova scienceNow (10pm, UNC-TV) - Season 6 has David Pogue examining the evolutionary roots of those traits that separate humans from other species, and also investigating what may have happened to Neanderthals.
Paranormal Witness (10pm, Syfy) - In North Carolina, a man claims to have seen an apparition of a red-haired girl running across his backyard. Also, a creature with 14-inch feet is tracked to a cabin in the woods of Ohio.