Exhibit 10.18  [PANAMSAT CORPORATION]  August 20, 2004  James W. Cuminale 16 Sylvan Lane Old Greenwich, CT 
06870  Dear Mr. Cuminale:  Reference is made to that certain PanAmSat Corporation Executive Change
in Control Severance Agreement (the Agreement), entered into as of
October 15, 2002, between yourself and PanAmSat Corporation (the Company).  This is to confirm our understanding that the Company will continue to
provide severance payments available to you pursuant to the Agreement until its
expiration.  Following the expiration of
the Agreement, if you are terminated by the Company without Cause (as defined
below) or you terminate your employment with the Company for Good Reason (as
defined below), then you shall be entitled to receive the severance payments
and benefits set forth in the Agreement, except that all references to a two
times multiplier shall be changed to a one times multiplier.  For purposes of this letter agreement, Cause shall mean: (i)
willful and continued failure to perform your material duties with respect to
the Company or it subsidiaries which continues beyond 10 days after a written
demand for substantial performance is delivered to you by the Company (the Cure
Period); or (ii) the willful or intentional engaging by you in conduct
that causes material and demonstrable injury, monetarily or otherwise, to the
Company, Constellation, LLC and their respective affiliates; or (iii)
conviction of, or a plea of nolo contendere
to, a crime constituting (A) a felony under the laws of the United States or
any state thereof or (B) a misdemeanor involving moral turpitude; or (iv) a
material breach of your management stockholders or other agreements, if any,
including, without limitation, engaging in any action in breach of the restrictive
covenants as set forth above, which continues beyond the Cure Period (to the
extent that, in the Board of Directors reasonable judgment, such breach can be
cured).  In connection with any
termination for Cause, you shall be given a statement of the specific reasons
constituting the grounds for termination for Cause and shall have the right to
appear before the Board of Directors to respond to allegations of any actions
allegedly constituting Cause prior to any termination by the Board of
Directors for Cause is effective.  For purposes of this letter agreement, Good Reason shall mean:
(i) a reduction in your base salary or annual incentive compensation
opportunity (other than a general reduction in base salary that affects all
members of senior management in substantially the same proportions, provided
that your base salary may not be reduced by more than 10%, and in no event
shall the base salary be reduced to an amount less than 10% of the base salary
on the date


hereof); or (ii) a substantial reduction in your duties and
responsibilities, or (iii) a transfer of your primary workplace by more than
fifty (50) miles from the current workplace.  Except as expressly provided herein, the Agreement remains in full
force and effect.  This letter agreement
may not be amended or modified except by an instrument in writing signed by
each of the parties hereto. This letter agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.  This letter agreement may be executed in two
or more counterparts, each of which shall be deemed to be an original, but all
of which shall constitute one and the same agreement.  [Signature Page Follows]


If the foregoing reflects your understanding, kindly sign and return a
copy of this letter, whereupon it will constitute a binding agreement between
us.  Sincerely,PANAMSAT CORPORATION./s/ Michael J. IngleseName: 
  Michael J. IngleseTitle:   
  Executive Vice President & Chief Financial OfficerAGREED
  AND ACCEPTEDAS
  OF AUGUST     , 2004James W. CuminaleBy:
  /s/ James W. CuminaleName: James W. Cuminale