Sun, 08/04/2024 - 20:02 Tech Insider Critical Role's Matthew Mercer and Brennan Lee Mulligan of "Dimension 20" are the famous faces of their respective shows. They're also close friends, they tell BI.Dimension 20; Critical Role Tags Entertainment, critical-role, dimension-20 Source What goes on behind the scenes in the most formidable alliance in the nerdworld…