After building up quite the following during its first season on NBC, “Grimm” has arrived at Comic Con and has completely taken over a café near the convention center. The ads surrounding the restaurant show off David Giuntoli as Nick Burkhardt, Russell Hornsby as Hank Griffin, Silas Weir Mitchell as Monroe and Bitsie Tulloch as Juliette, all of whom will be present at the “Grimm” panel in addition to Reggie Lee, Sasha Roiz, Bree Turner and more on Saturday from 3:00 to 4:00pm.