Comic Title: Hellblazer #20
Publisher: DC
Imprint: Vertigo
Cover Date: July 1989
On Sale Date: May 23, 1989 Shipping Date May 25, 1989
Source: Amazing Heroes, #165

Shipping Date May 23, 1989
Source: Previews, #3

Shipping Date May 25, 1989
Source: Advance Comics, #5

Copyright Date May 23, 1989
Source: Library of Congress, Copyright Office 1989

Cover Price: $1.50
Page Count: 32
Editor: Karen Berger

Title: "Betrayal"
Pages: 24

Feature(s):
Hellblazer

Writer: Jamie Delano
Penciller: Mark Buckingham
Inker: Alfredo P. Alcala
Letterer: Elitta Fell
Colorist: Lovern Kindzierski

Reprinted In:
John Constantine, Hellblazer:The Fear Machine TPB (2008)
John Constantine, Hellblazer:The Fear Machine TPB (2012)

Feature Character(s)

• John Constantine (last appearance in Hellblazer #19; next appearance in Hellblazer #21)

Supporting Character(s)

• Mercury (last appearance in Hellblazer #19; next appearance in Hellblazer #21)
• Geoff Talbot (last appearance in Hellblazer #19; next appearance in Hellblazer #21)
• Simon Hughes (last appearance in Hellblazer #19; next appearance in Hellblazer #21)
• Zed (last appearance in Hellblazer #19; next appearance in Hellblazer #21)
• Marj (last appearance in Hellblazer #19; next appearance in Hellblazer #21)

Villain(s)

• Doctor Phillip Fulton (first name revealed; dies in this story; last appearance in Hellblazer #19; no further appearances)
• The director of Geotroniks (last appearance in Hellblazer #18; next appearance in Hellblazer #21)
• Mr. Webster (last appearance in Hellblazer #18; next appearance in Hellblazer #21)
• Davis (last appearance in Hellblazer #17; next appearance in Hellblazer #21)
• Beale (last appearance in Hellblazer #17; no further appearances)
• The Black Squad (last appearance in Hellblazer #17; no further appearances)
• The Terror-Thing (last appearance in Hellblazer #19; next appearance in Hellblazer #21)

Other Character(s)

• Sergei Antonov (last appearance in Hellblazer #17; next appearance in Hellblazer #21)
• Mrs. Corbett (last appearance in Hellblazer #18; no further appearances)
• Matthew Reilly (dies in this story; last appearance in Hellblazer #19; no further appearances)
• A lab assistant (no further appearances)
• Ken and Harold (mostly behind-the-scenes; last appearance in Hellblazer #19; next appearance in Hellblazer #21)

Comments:
The Fear Machine, Part VII

This story is continued in part from Hellblazer #19 and continues in Hellblazer #21.

Synopsis:
Mercury is able to convince Doctor Fulton to take her outside where she escapes. Fulton is arrested and then killed by Mr. Webster.

Meanwhile, Talbot takes Constantine to meet the Russian man he rescued from the train. Along with Simon Hughes, the four men put together the plot by the Masons to create a magical fear machine. While John steps out for cigarettes, the others are arrested by Davis and the Black Squad.

Elsewhere Webster sacrifices one of the test subjects to bring the creature Jallakuntilliokan into the world. Mercury, Marj, and John all feel its psychic emanations.