Actor Peter Krause ("9-1-1"); filmmaker and National Geographic Explorer Bertie Gregory ("Secrets of the Penguins"); ABC News chief national correspondent Matt Gutman with a preview of the Tokyo "Star Wars" celebration; "SportsCenter" anchors Gary Striewski and Randy Scott ("SC+"); Kate Gibson and Charlie Gibson ("The Book Case" podcast); The Right Stuff series with "GMA" lifestyle contributor Lori Bergamotto.

Chef Eden Grinshpan talks about her new cookbook ("Tahini Baby"); GMA5k with Peloton instructor Becs Gentry; chief meteorologist and chief climate correspondent Ginger Zee explores how rock dust is being used to fertilize farms and combat climate change; Earth Day-themed Deals & Steals with ABC e-commerce editor Tory Johnson.