War and Peace and War - S1.E56

While Buzz is testing out the LGMs latest invention (...some sort of space-scooter...), the LGMs are struck by a need to ""heed the heed"". As if hypnotized, they all commandeer a ship and fly off. While Zurg is attempting to dispatch hornets to defeat Buzz and capture the space-scooter thing, the same thing happens to the Grubs. The Grubs and the LGMs arrive on a distant planet (...Buzz and Zurg catch up in a few minutes...), where a giant, intangible, glowing head named Guzelian the Alien (...a member of the Heed, an advanced race that has transcended physical form...) tells them that they must work to bring peace throughout the galaxy. The Grubs return to Planet Z, the LGMs return to Star Command, and both of them then proceed to dis-assemble any weapons or armaments that they have, in order to issue in this new age of peace. After a charming little ditty written and performed by Mr. Idle, entitled ""Let's Make Peace!"", Buzz grows wary of Guzelian's intentions.