All images left to right unless otherwise indicated
American Experience: © Corbis | National Archives | © Webb Chappell | Courtesy Library of Congress
America Revealed: © Jeffross.com | © Jeff Savage | © Istock photo | © Istock photo
Antiques Roadshow (All Images): © WGBH/ Jeff Dunn
Arthur (All Images): © TM/Marc Brown
Broadway or Bust: © Bruce Glikas
Chefs of State (All Images): © Walter Scheib
Curious George (All Images): TM & © 2008/2011 Universal Studios and/or HMCo. All Rights Reserved
Dinosaur Train (All Images): TM & © The Jim Henson Company
Frontline: © Martin Smith for Frontline | Official White House photo by Pete Souza | Courtesy of FRONTLINE
Hometime: © Mike Habermann| ©Hometime | ©Hometime | ©Hometime
Lidia's Italy in America and Lidia Celebrates America (All Images): Bill Bettencourt
Market Wars: © iStock Photo | © iStock Photo
Martha Speaks (All Images): Tm/© 2008 WGBH Educational Foundation.Tm/© “MARTHA” and underlying “MARTHA” books artwork: Susan Meddaugh
Masterpiece: © Joss Barratt | © ITV for Masterpiece | © ITV for Masterpiece
NOVA: ©WGBH Educational Foundation | ©Mark Bussell, Providence Pictures | © Lark Elliott | Courtesy of NASA, ESA, Hubble SM4 ERO (above photo)
NOVA scienceNOW: © Istock photo | © Istock photo | ©WGBH Educational Foundation
POV © Courtesy of Ramona Diaz | © Lixin Fan | © Chris Hegedus | © Red Square Productions | © Heather Courtney
Sesame Street (All Images): © Richard Termine
Simply Ming (All Images): © Emily Stern
Super WHY: © 2012 Out of the Blue Enterprises LLC
The Electric Company: © 2009/2011 Sesame Workshop
The World (All Images): Courtesy of PRI's The World
Wild Kratts: © Wild Kratts