Columns: № | # | Title | Directed by | Written by | Original air date | Production code | U.S. viewers (million)
44 | 1 | " Olivia " | Joe Chappelle | J. H. Wyman & Jeff Pinkner | September23,2010 | 3X6101 | 5.83 | 45 | 2 | " The Box " | Jeffrey Hunt | Josh Singer & Graham Roland | September30,2010 | 3X6102 | 5.24 | 46 | 3 | " The Plateau " | Brad Anderson | Alison Schapker & Monica Owusu-Breen | October7,2010 | 3X6103 | 5.19 | 47 | 4 | " Do Shapeshifters Dream of Electric Sheep? " | Ken Fink | David Wilcox & Matthew Pitts | October14,2010 | 3X6104 | 5.22 | 48 | 5 | " Amber 31422 " | David Straiton | Josh Singer & Ethan Gross | November4,2010 | 3X6105 | 4.80 | 49 | 6 | " 6955 kHz " | Joe Chappelle | Robert Chiappetta & Glen Whitman | November11,2010 | 3X6106 | 4.82 | 50 | 7 | " The Abducted " | Chuck Russell | David Wilcox & Graham Roland | November18,2010 | 3X6107 | 4.85 | 51 | 8 | " Entrada " | Brad Anderson | Jeff Pinkner & J. H. Wyman | December2,2010 | 3X6108 | 5.13 | 52 | 9 | " Marionette " | Joe Chappelle | Monica Owusu-Breen & Alison Schapker | December9,2010 | 3X6109 | 4.74 | 53 | 10 | " The Firefly " | Charles Beeson | J. H. Wyman & Jeff Pinkner | January21,2011 | 3X6110 | 4.87 | 54 | 11 | " Reciprocity " | Jeannot Szwarc | Josh Singer | January28,2011 | 3X6111 | 4.53 | 55 | 12 | " Concentrate and Ask Again " | Dennis Smith | Graham Roland & Matthew Pitts | February4,2011 | 3X6112 | 4.26 | 56 | 13 | " Immortality " | Brad Anderson | David Wilcox & Ethan Gross | February11,2011 | 3X6113 | 3.74 | 57 | 14 | " 6B " | Thomas Yatsko | Glen Whitman & Robert Chiappetta | February18,2011 | 3X6114 | 4.02 | 58 | 15 | " Subject 13 " | Frederick E. O. Toye | Jeff Pinkner & J. H. Wyman & Akiva Goldsman | February25,2011 | 3X6115 | 4.02 | 59 | 16 | " Os " | Brad Anderson | Josh Singer & Graham Roland | March11,2011 | 3X6116 | 3.64 | 61 | 18 | " Bloodline " | Dennis Smith | Alison Schapker & Monica Owusu-Breen | March25,2011 | 3X6118 | 3.84 | 63 | 20 | " 6:02 AM EST " | Jeannot Szwarc | David Wilcox & Josh Singer & Graham Roland | April22,2011 | 3X6120 | 3.33