So far we have the following information provided about Season 3B

311: Tom Verica (previous episodes: 106, 201, 207, 213, 218, 222, 301 & 310)

312: Oliver Bokelberg (previous episodes: 208, 304 & 309)

313: Randy Zisk (previous episodes: 215 & 305)

314: Paul McCrane

315: Tony Goldwyn (previous episode: 220)

316: Jeannot Szwarc (previous episodes: 212 & 303)

317: Debbie Allen

318: TBD (hopefully Tom Verica!)