When does Good Luck Charlie return?

Good Luck Charlie is an American sitcom that aired on Disney Channel from April 4, 2010, to February 16, 2014. Set in Denver, Colorado, the series follows the Duncan family of Denver as they adjust to the births of their fourth and fifth children. In each episode, Teddy Duncan (Bridgit Mendler) adds to a video diary that contains advice for Charlie about their family and life as a teenager. Each video diary ends with Teddy (or another family member, even Charlie) saying "Good luck, Charlie"
The series follows the Duncan family, who are still adjusting to the birth of their fourth child, Charlotte "Charlie" Duncan. The events in each episode become material for a video diary that Teddy is making for Charlie. Teddy hopes the videos will provide useful advice for Charlie after they have both grown up and Teddy has moved out.