Columns: No. in series | No. in season | Title | Directed by | Written by | Original air date | Production code | U.S. viewers (millions)
203 | 1 | "Trials" | David Platt | Dawn DeNoon | September 23, 2008 | 10002 | 9.52 | 204 | 2 | "Confession" | Arthur W. Forney | Judith McCreary | September 30, 2008 | 10003 | 10.22 | 205 | 3 | "Swing" | David Platt | Amanda Green | October 14, 2008 | 10004 | 9.40 | 206 | 4 | "Lunacy" | Peter Leto | Daniel Truly | October 21, 2008 | 10001 | 9.35 | 207 | 5 | "Retro" | Peter Leto | Jonathan Greene & Joshua Kotcheff | October 28, 2008 | 10005 | 9.20 | 208 | 6 | "Babes" | David Platt | Daniel Truly | November 11, 2008 | 10006 | 9.42 | 209 | 7 | "Wildlife" | Peter Leto | Mick Betancourt | November 18, 2008 | 10008 | 10.18 | 210 | 8 | "Persona" | Helen Shaver | Amanda Green | November 25, 2008 | 10009 | 8.55 | 211 | 9 | "PTSD" | Eriq La Salle | Judith McCreary | December 2, 2008 | 10007 | 10.31 | 212 | 10 | "Smut" | Chris Eyre | Kam Miller | December 9, 2008 | 10010 | 10.93 | 213 | 11 | "Stranger" | David Platt | Dawn DeNoon | January 6, 2009 | 10011 | 10.64 | 214 | 12 | "Hothouse" | Peter Leto | Charley Davis | January 13, 2009 | 10012 | 9.66 | 215 | 13 | "Snatched" | David Platt | Mick Betancourt | February 3, 2009 | 10013 | 10.31 | 216 | 14 | "Transitions" | Peter Leto | Ken Storer | February 17, 2009 | 10014 | 9.45 | 217 | 15 | "Lead" | David Platt | Jonathan Greene | March 10, 2009 | 10015 | 11.03 | 218 | 16 | "Ballerina" | Peter Leto | Daniel Truly | March 17, 2009 | 10016 | 10.58 | 219 | 17 | "Hell" | David Platt | Amanda Green | March 31, 2009 | 10017 | 9.34 | 220 | 18 | "Baggage" | Chris Zalla | Judith McCreary | April 7, 2009 | 10018 | 9.08 | 221 | 19 | "Selfish" | David Platt | Mick Betancourt | April 28, 2009 | 10019 | 10.23 | 222 | 20 | "Crush" | Peter Leto | Jonathan Greene | May 5, 2009 | 10020 | 9.79 | 223 | 21 | "Liberties" | Juan J. Campanella | Dawn DeNoon | May 19, 2009 | 10021 | 6.73