Columns: No. in series | No. in season | Title | Directed by | Written by | Original air date | U.S. viewers (millions)
209 | 3 | "Working Stiffs" | Naren Shankar | Naren Shankar | October8,2009 | 14.90 | 211 | 5 | "Bloodsport" | Jeffrey G. Hunt | Allen MacDonald | October29,2009 | 15.24 | 212 | 6 | "Death & The Maiden" | Brad Tanenbaum | Jacqueline Hoyt | November5,2009 | 15.60 | 213 | 7 | " The Lost Girls " | Alec Smight | David Weddle & Bradley Thompson | November12,2009 | 17.38 | 214 | 8 | "Lover's Lanes" | Andrew Bernstein | Dustin Lee Abraham | November19,2009 | 14.91 | 215 | 9 | "Appendicitement" | Kenneth Fink | Evan Dunsky | December10,2009 | 16.43 | 218 | 12 | "Long Ball" | Alec Smight | Christopher Barbour | January21,2010 | 14.29 | 219 | 13 | "Internal Combustion" | Brad Tanenbaum | Jennifer N. Levin | February4,2010 | 14.49 | 220 | 14 | "Unshockable" | Kenneth Fink | Michael Frost Beckner | March4,2010 | 15.59 | 221 | 15 | "Neverland" | Alec Smight | Tom Mularz | March11,2010 | 15.25 | 223 | 17 | "Irradiator" | Michael Nankin | Bradley Thompson & David Weddle | April8,2010 | 14.97 | 225 | 19 | "World's End" | Alec Smight | Evan Dunsky | April22,2010 | 13.35 | 226 | 20 | "Take My Life, Please!" | Martha Coolidge | David Rambo & Dustin Lee Abraham | April29,2010 | 13.63 | 227 | 21 | "Lost & Found" | Frank Waldeck | Corinne Marrinan & Elizabeth Devine | May6,2010 | 14.15 | 228 | 22 | "Doctor Who" (Part 1) | Jeffrey Hunt | Tom Mularz | May13,2010 | 13.42