The Guide to DC Crossovers
Countdown
Countdown #51 
Dated: July 2007 
On Sale: May 9, 2007
Countdown #51
Countdown #50 
Dated: July 2007 
On Sale: May 16, 2007
Countdown #50
Countdown #49 
Dated: July 2007 
On Sale: May 23, 2007
Countdown #49
Countdown #48 
Dated: July 2007 
On Sale: May 31, 2007
Countdown #48
Countdown #47 
Dated: August 2007 
On Sale: June 6, 2007
Countdown #47
Countdown #46 
Dated: August 2007 
On Sale: June 13, 2007
Countdown #46
Countdown #45 
Dated: August 2007 
On Sale: June 20, 2007
Countdown #45
Countdown #44 
Dated: August 2007 
On Sale: June 27, 2007
Countdown #44
Countdown #43 
Dated: September 2007 
On Sale: July 5, 2007
Countdown #43
Countdown #42 
Dated: September 2007 
On Sale: July 11, 2007
Countdown #42
Action Comics #852 
Dated: September 2007 
On Sale: July 18, 2007
Action Comics #852
Countdown #41 
Dated: September 2007 
On Sale: July 18, 2007
Countdown #41
Countdown #40 
Dated: September 2007 
On Sale: July 25, 2007
Countdown #40
Superman #665 
Dated: September 2007 
On Sale: July 25, 2007
Superman #665
Action Comics #853 
Dated: Early October 2007 
On Sale: August 1, 2007
Action Comics #853
All New Atom #14 
Dated: October 2007 
On Sale: August 1, 2007
All New Atom #14
Countdown #39 
Dated: October 2007 
On Sale: August 1, 2007
Countdown #39
Countdown #38 
Dated: October 2007 
On Sale: August 8, 2007
Countdown #38
Action Comics #854 
Dated: October 2007 
On Sale: August 15, 2007
Action Comics #854
Countdown #37 
Dated: October 2007 
On Sale: August 15, 2007
Countdown #37
Outsiders:Five of a Kind – Martian Manhunter/Thunder #1 
Dated: October 2007 
On Sale: August 15, 2007
Outsiders:Five of a Kind – Martian Manhunter/Thunder #1
Countdown #36 
Dated: October 2007 
On Sale: August 22, 2007
Countdown #36
Countdown #35 
Dated: October 2007 
On Sale: August 29, 2007
Countdown #35
Countdown to Adventure #1 
Dated: October 2007 
On Sale: August 29, 2007
Countdown to Adventure #1
Outsiders:Five of a Kind – Wonder Woman/Grace #1 
Dated: October 2007 
On Sale: August 29, 2007
Outsiders:Five of a Kind – Wonder Woman/Grace #1
All New Atom #15 
Dated: November 2007 
On Sale: September 6, 2007
All New Atom #15
Countdown #34 
Dated: November 2007 
On Sale: September 6, 2007
Countdown #34
Supergirl #21 
Dated: November 2007 
On Sale: September 6, 2007
Supergirl #21
Countdown #33 
Dated: November 2007 
On Sale: September 12, 2007
Countdown #33
Countdown Presents the Search for Ray Palmer:Wildstorm #1 
Dated: November 2007 
On Sale: September 12, 2007
Countdown Presents the Search for Ray Palmer:Wildstorm #1
Countdown #32 
Dated: November 2007 
On Sale: September 19, 2007
Countdown #32
Countdown to Mystery #1 
Dated: November 2007 
On Sale: September 19, 2007
Countdown to Mystery #1
Countdown #31 
Dated: November 2007 
On Sale: September 26, 2007
Countdown #31
Countdown to Adventure #2 
Dated: November 2007 
On Sale: September 26, 2007
Countdown to Adventure #2
Countdown #30 
Dated: December 2007 
On Sale: October 3, 2007
Countdown #30
Countdown Presents:The Search for Ray Palmer:Crime Society #1 
Dated: December 2007 
On Sale: October 3, 2007
Countdown Presents:The Search for Ray Palmer:Crime Society #1
Detective Comics #837 
Dated: December 2007 
On Sale: October 3, 2007
Detective Comics #837
Supergirl #22 
Dated: December 2007 
On Sale: October 3, 2007
Supergirl #22
Captain Carrot and the Final Ark #1 
Dated: December 2007 
On Sale: October 10, 2007
Captain Carrot and the Final Ark #1
Countdown #29 
Dated: December 2007 
On Sale: October 10, 2007
Countdown #29
Countdown #28 
Dated: December 2007 
On Sale: October 17, 2007
Countdown #28
Countdown #27 
Dated: December 2007 
On Sale: October 24, 2007
Countdown #27
Countdown #26 
Dated: December 2007 
On Sale: October 31, 2007
Countdown #26
Countdown Presents:Lord Havok & the Extremists #1 
Dated: December 2007 
On Sale: October 31, 2007
Countdown Presents:Lord Havok & the Extremists #1
Countdown to Adventure #3 
Dated: December 2007 
On Sale: October 31, 2007
Countdown to Adventure #3
Countdown to Mystery #2 
Dated: December 2007 
On Sale: October 31, 2007
Countdown to Mystery #2
Countdown #25 
Dated: January 2008 
On Sale: November 7, 2007
Countdown #25
Countdown Presents:The Search for Ray Palmer:Red Rain #1 
Dated: January 2008 
On Sale: November 7, 2007
Countdown Presents:The Search for Ray Palmer:Red Rain #1
Captain Carrot and the Final Ark #2 
Dated: January 2008 
On Sale: November 14, 2007
Captain Carrot and the Final Ark #2
Countdown #24 
Dated: January 2008 
On Sale: November 14, 2007
Countdown #24
Countdown #23 
Dated: January 2008 
On Sale: November 21, 2007
Countdown #23
Countdown Presents:The Search for Ray Palmer:Gotham by Gaslight #1 
Dated: January 2008 
On Sale: November 21, 2007
Countdown Presents:The Search for Ray Palmer:Gotham by Gaslight #1
Countdown to Mystery #3 
Dated: January 2008 
On Sale: November 21, 2007
Countdown to Mystery #3
Countdown #22 
Dated: January 2008 
On Sale: November 29, 2007
Countdown #22
Countdown Presents:Lord Havok & the Extremists #2 
Dated: January 2008 
On Sale: November 29, 2007
Countdown Presents:Lord Havok & the Extremists #2
Countdown to Adventure #4 
Dated: January 2008 
On Sale: November 29, 2007
Countdown to Adventure #4
Countdown #21 
Dated: February 2008 
On Sale: December 5, 2007
Countdown #21
Countdown:Arena #1 
Dated: February 2008 
On Sale: December 5, 2007
Countdown:Arena #1
Captain Carrot and the Final Ark #3 
Dated: February 2008 
On Sale: December 12, 2007
Captain Carrot and the Final Ark #3
Countdown #20 
Dated: February 2008 
On Sale: December 12, 2007
Countdown #20
Countdown Presents:The Search for Ray Palmer:Red Son #1 
Dated: February 2008 
On Sale: December 12, 2007
Countdown Presents:The Search for Ray Palmer:Red Son #1
Countdown:Arena #2 
Dated: February 2008 
On Sale: December 12, 2007
Countdown:Arena #2
Countdown #19 
Dated: February 2008 
On Sale: December 19, 2007
Countdown #19
Countdown Presents:The Search for Ray Palmer:Superwoman/Batwoman #1 
Dated: February 2008 
On Sale: December 19, 2007
Countdown Presents:The Search for Ray Palmer:Superwoman/Batwoman #1
Countdown:Arena #3 
Dated: February 2008 
On Sale: December 19, 2007
Countdown:Arena #3
Countdown #18 
Dated: February 2008 
On Sale: December 28, 2007
Countdown #18
Countdown to Adventure #5 
Dated: February 2008 
On Sale: December 28, 2007
Countdown to Adventure #5
Countdown:Arena #4 
Dated: February 2008 
On Sale: December 28, 2007
Countdown:Arena #4
Countdown #17 
Dated: March 2008 
On Sale: January 4, 2008
Countdown #17
Countdown Presents:Lord Havok & the Extremists #3 
Dated: February 2008 
On Sale: January 4, 2008
Countdown Presents:Lord Havok & the Extremists #3
Countdown to Mystery #4 
Dated: February 2008 
On Sale: January 4, 2008
Countdown to Mystery #4
Countdown #16 
Dated: March 2008 
On Sale: January 9, 2008
Countdown #16
Countdown #15 
Dated: March 2008 
On Sale: January 16, 2008
Countdown #15
Countdown #14 
Dated: March 2008 
On Sale: January 23, 2008
Countdown #14
Countdown Presents:Lord Havok & the Extremists #4 
Dated: March 2008 
On Sale: January 23, 2008
Countdown Presents:Lord Havok & the Extremists #4
Countdown to Mystery #5 
Dated: March 2008 
On Sale: January 23, 2008
Countdown to Mystery #5
Countdown #13 
Dated: March 2008 
On Sale: January 30, 2008
Countdown #13
Countdown to Adventure #6 
Dated: March 2008 
On Sale: January 30, 2008
Countdown to Adventure #6
Countdown #12 
Dated: April 2008 
On Sale: February 6, 2008
Countdown #12
Countdown #11 
Dated: April 2008 
On Sale: February 13, 2008
Countdown #11
Countdown #10 
Dated: April 2008 
On Sale: February 20, 2008
Countdown #10
Countdown #9 
Dated: April 2008 
On Sale: February 27, 2008
Countdown #9
Countdown #8 
Dated: May 2008 
On Sale: March 5, 2008
Countdown #8
Countdown Presents:Lord Havok & the Extremists #5 
Dated: April 2008 
On Sale: March 5, 2008
Countdown Presents:Lord Havok & the Extremists #5
Countdown to Adventure #7 
Dated: April 2008 
On Sale: March 5, 2008
Countdown to Adventure #7
Countdown #7 
Dated: May 2008 
On Sale: March 12, 2008
Countdown #7
Countdown to Mystery #6 
Dated: April 2008 
On Sale: March 12, 2008
Countdown to Mystery #6
Countdown #6 
Dated: May 2008 
On Sale: March 19, 2008
Countdown #6
Countdown #5 
Dated: May 2008 
On Sale: March 26, 2008
Countdown #5
Countdown Presents:Lord Havok & the Extremists #6 
Dated: May 2008 
On Sale: March 26, 2008
Countdown Presents:Lord Havok & the Extremists #6
Countdown to Adventure #8 
Dated: May 2008 
On Sale: March 26, 2008
Countdown to Adventure #8
Countdown #4 
Dated: June 2008 
On Sale: April 2, 2008
Countdown #4
Countdown #3 
Dated: June 2008 
On Sale: April 9, 2008
Countdown #3
Countdown #2 
Dated: June 2008 
On Sale: April 16, 2008
Countdown #2
Countdown #1 
Dated: June 2008 
On Sale: April 23, 2008
Countdown #1
Countdown to Mystery #7 
Dated: May 2008 
On Sale: May 7, 2008
Countdown to Mystery #7
Countdown to Mystery #8 
Dated: June 2008 
On Sale: May 21, 2008
Countdown to Mystery #8

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