What's on TV Tonight | September 27

The Big Bang Theory 7-7:30pm, CBS. Raj is feeling lonely when his friends are out dating and Howard attempts moderate an argument between Bernadette and his mother while in space.

Last Resort 7-8pm, ABC. When a submarine captain question suspicious orders to fire on another country, he and his crew find themselves under attack from fellow United States forces.

Parks and Recreation 8:30-9pm, NBC. In an attempt to combat Pawnee's obesity problem, Leslie passes a tax on large sodas.

Scandal 9-10pm, ABC. Quinn's identity is revealed and Olivia and the team must work to prevent her from going to jail for the rest of her life.

Louie 9-9:35pm, FX. Louie struggles with the New Year's Eve holiday.