The Defeat of the Daleks was a story included in the Doctor Who Give-a-Show Projector set.
The Doctor and Ian have finished construction of a ray gun which will allow them to fight back against the Daleks. Confronted by a trio a Daleks, Ian tests the gun against DK3 and successfully destroys it. The remaining Daleks promptly retreat to their Dalek ship and leave the planet with their fleet for home. Though the Daleks are now gone, the Doctor wonders if they will return.
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