Sarah Chalke is scrubbing in as Katherine Heigl’s BFF. The Scrubs/Roseanne vet has been tapped as the co-lead in Firefly Lane, Netflix's 10-episode series adaptation of Kristin Hannah's best-selling book, TVLine has learned. Firefly Lane centers on two inseparable best friends -- legendary talk show host Tully (Heigl) and the awkward and shy Kate (Chalke) […]