**Exhibit 4.22**

**FIFTH SUPPLEMENTAL INDENTURE**

**FIFTH SUPPLEMENTAL INDENTURE**, dated as of May 31, 2006,among CanWest MediaWorks Inc. (“**CMI**”), CanWest MediaWorks (US) Holdings Corp. (the “**New Guarantor**”), and The Bank of New York, as trustee (the “**Trustee**”). 

WHEREAS, CanWest Media Inc., a predecessor of CMI, the guarantors thereunder and the Trustee are parties to that certain indenture, dated as ofNovember 18, 2004 (as amended and supplemented to the date hereof, the “**Indenture**”); 

WHEREAS Section 8.01 ofthe Indenture permits CMI and any Guarantor, when authorized by a Board Resolution of each of them, and the Trustee to supplement the Indenture without notice to or consent of any Noteholder to add a Guarantor; 

WHEREAS, on March 3, 2006, the New Guarantor guaranteed the indebtedness of CMI under the credit agreement dated as of 13 October 2005,between, *inter alia,* CMI, as borrower, the New Guarantor, as guarantor, such other guarantors as are from time to time party thereto, The Bank of Nova Scotia, as administrative agent, lead arranger and joint bookrunner and the lenders fromtime to time party thereto (as amended, supplemented or otherwise modified from time to time, the “**Credit Agreement**”). 

WHEREAS, it is necessary for the New Guarantor to provide a Guarantee (as defined in the Indenture) under the Indenture in accordance with Sections 4.14 and 11.04 thereunder; 

WHEREAS, the Boards of Directors of CMI and the New Guarantor have authorized this Fifth Supplemental Indenture; and 

WHEREAS, all things necessary to make this Fifth Supplemental Indenture a valid supplement to the Indenture according to its terms and the terms of theIndenture have been done. 

NOW, THEREFORE, each party agrees as follows for the benefit of the other parties and for the equal and ratablebenefit of the Holders of the Notes: 

ARTICLE I 

GUARANTEES 

Section 1.1 The New Guarantor hereby expressly assumes the obligations of aGuarantor under the Indenture, as evidenced by this Fifth Supplemental Indenture and its execution of a Guarantee in the form required under the Indenture. 

Section 1.2 In accordance with Section 4.14 of the Indenture, the Guarantee of each New Guarantor provided under Section 1.1 hereunder shall be automatically and unconditionally released anddischarged, without any further action required on the part of the Trustee or any Holder of Notes, upon: 

(1) the unconditional release ofsuch New Guarantor from its liability in respect of the Indebtedness under the Credit Agreement; or 

(2) any sale or other disposition (by merger or otherwise) to any Person that is not a RestrictedSubsidiary of a controlling interest in, or all or substantially all of the assets of, such New Guarantor, provided that: 

(a) such sale or disposition of such controlling interest or assets is otherwise in compliance with the terms of the Indenture; and 

(b) such assumption, guarantee or other liability of such New Guarantor has been released by the Holders of the Other Indebtedness so guaranteed. 

ARTICLE II 

OTHER PROVISIONS 

Section 2.1 All capitalized terms used and not otherwise defined herein shall have the meanings ascribed to them in the Indenture. 

Section 2.2 THIS FIFTH SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. EACH OF THE PARTIES HERETO AGREES TO SUBMIT TO THE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS FIFTH SUPPLEMENTAL INDENTURE, THENOTES OR THE GUARANTEES. 

Section 2.3 All agreements of CMI and the New Guarantor in this Fifth Supplemental Indenture shallbind their respective successors. All agreements of the Trustee in this Fifth Supplemental Indenture shall bind its successors. 

Section 2.4 The parties may sign multiple counterparts of this Fifth Supplemental Indenture. Each signed counterpart shall be deemed an original, but all of them together represent one and the same agreement. 

Section 2.5 The parties to this Fifth Supplemental Indenture have expressly requested that this Fifth Supplemental Indenture and all relatednotices, amendments and other documents be drafted in the English Language. Les parties a la présente convention ont expressément exigé que cette convention et tous les avis, modifications et autres documents y afférentssoient rédigés en langue anglaise seulement. 

Section 2.6 Except as amended hereby, the Indenture and the Notesare in all respects ratified and confirmed and all the terms shall remain in full force and effect. 

*[Signature page follows]*

 

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IN WITNESS WHEREOF, the parties have caused this Fifth Supplemental Indenture to be duly executed, all asof the date and year first written above. 

 
**CANWEST MEDIAWORKS INC.**By: 
 
Name: Richard M. LeipsicTitle: Vice-PresidentBy: 
 
Name: John E. MaguireTitle: Chief Financial Officer
**CANWEST MEDIAWORKS (US)**

**HOLDINGSCORP.**
By: 
 
Name: Thomas C. StrikeTitle: Vice-PresidentBy: 
 
Name: John E. MaguireTitle: Vice-President**THE BANK OF NEW YORK, as Trustee**By: 
 
Name: Title: