EXCLUSIVE: Cast for the third and final season of HBO's The Comeback continues to fill out, as seven have been added as recurring guest stars, including John Early (Maddie's Secret), Barry Shabaka Henley (Bob Hearts Abishola), Abbi Jacobson (Broad City), Tony Macht (Oh, Mary!), Brittany O'Grady (A House of Dynamite), Zane Phillips (Fire Island), and [...]