<Ul> <Li> Morgan Hinkleman (season 1--3) and Kathryn Newton (seasons 3--4) as Joanie Clark </Li> <Li> Alana Cavanaugh (season 1--3) and Susanna Skaggs (season 4) as Haley Clark </Li> <Li> August Emerson as Malcolm "Lev" Levitan (seasons 1--3) </Li> <Li> Cooper Andrews as Yo - Yo Engberk (seasons 1--3) </Li> <Li> David Wilson Barnes as Dale Butler (seasons 1, 4) </Li> <Li> Graham Beckel as Nathan Cardiff (seasons 1--2) </Li> <Li> Annette O'Toole as Susan Emerson (seasons 1--2) </Li> <Li> Mike Pniewski as Barry Shields (seasons 1--2) </Li> <Li> Scott Michael Foster as Hunt Whitmarsh (season 1) </Li> <Li> John Getz as Joe MacMillan, Sr. (season 1) </Li> <Li> Mark O'Brien as Tom Rendon (seasons 2--4) </Li> <Li> James Cromwell as Jacob Wheeler (season 2) </Li> <Li> Annabeth Gish as Diane Gould (seasons 3--4) </Li> <Li> Manish Dayal as Ryan Ray (season 3) </Li> <Li> Matthew Lillard as Ken Diebold (season 3) </Li> <Li> Anna Chlumsky as Dr. Katie Herman (season 4) </Li> <Li> Molly Ephraim as Alexa Vonn (season 4) </Li> </Ul> <Li> Morgan Hinkleman (season 1--3) and Kathryn Newton (seasons 3--4) as Joanie Clark </Li> <Li> Alana Cavanaugh (season 1--3) and Susanna Skaggs (season 4) as Haley Clark </Li> <Li> August Emerson as Malcolm "Lev" Levitan (seasons 1--3) </Li>

When does the next season of halt and catch fire start