List of Ugly Betty episodes
Season 4 (2009–10)
Note: Episodes 66–74 all aired on Fridays (October 16 – December 11, 2009); Episodes 75–85 aired on Wednesdays (January 6, 2010 – April 14, 2010).

List of Ugly Betty episodes

Section Title: Season 4 (2009–10)
Table Section Text: Note: Episodes 66–74 all aired on Fridays (October 16 – December 11, 2009); Episodes 75–85 aired on Wednesdays (January 6, 2010 – April 14, 2010).

No. overall	No. in season	Title	Directed by	Written by	Original air date	U.S. viewers (millions)

66	1	"The Butterfly Effect (Part 1)"	John Terlesky	Sheila Lawrence & Henry Alonso Myers	October 16, 2009	5.01

67	2	"The Butterfly Effect (Part 2)"	Victor Nelli, Jr.	Sheila Lawrence & Henry Alonso Myers	October 16, 2009	5.18

68	3	"Blue on Blue"	Victor Nelli, Jr	Abraham Higginbotham	October 23, 2009	4.55

69	4	"The Weiner, the Bun, and the Boob"	Wendey Stanzler	Brian Tanen	October 30, 2009	4.50

70	5	"Plus None"	Paul Holahan	Cara DiPaolo	November 6, 2009	4.76

71	6	"Backseat Betty"	John Putch	Tracy Poust & Jon Kinnally	November 13, 2009	4.46

72	7	"Level (7) with Me"	John Fortenberry	Chris Black	November 27, 2009	3.39

73	8	"The Bahamas Triangle"	Victor Neili, Jr.	Sheila Lawrence	December 4, 2009	4.23

74	9	"Be-Shure"	David Dworetzky	Gail Lerner	December 11, 2009	4.80

75	10	"The Passion of the Betty"	S.J. Clarkson	David Grubstick & Chris Black	January 6, 2010	5.13

76	11	"Back in Her Place"	Richard Heus	Abraham Higginbotham	January 13, 2010	4.67

77	12	"Blackout!"	John Putch	Cara DiPaolo	January 20, 2010	4.59

78	13	"Chica and the Man"	Victor Nelli, Jr.	Gail Lerner	February 3, 2010	4.34

79	14	"Smokin' Hot"	John Scott	Brian Tanen	February 10, 2010	4.68

80	15	"Fire and Nice"	John Terlesky	Erika Johnson	March 10, 2010	4.10

81	16	"All the World's a Stage"	Andy Wolk	Abraham Higginbotham & David Grubstick	March 17, 2010	3.33

82	17	"Million Dollar Smile"	Paul Holahan	Henry Alonso Myers & Chris Black	March 24, 2010	4.56

83	18	"London Calling"	Mark Worthington	David Grubstick & Sheila Lawrence	March 31, 2010	4.01

84	19	"The Past Presents the Future"	Paul Holahan	Jon Kinnaly & Tracy Poust	April 7, 2010	4.03

85	20	"Hello Goodbye"	Victor Nelli Jr.	Silvio Horta	April 14, 2010	5.43

Sentence(s)

The Hello Goodbye episode serves as the 20th and final episode of the fourth season.

final_sentence: The Hello Goodbye episode serves as the 20th and final episode of the fourth season.