 The traditional Simpsons opening sequence was replaced in this episode with a redesigned version that <unk> the opening sequence of the HBO medieval fantasy series Game of <unk> . The Game of <unk> opening shows the various locations featured in the series on a three @-@ dimensional map of the fictional continent <unk> . In the Simpsons opening , these locations were substituted with places in Springfield , and The Wall was replaced with the Simpson family 's <unk> . The theme song featured in the Game of <unk> opening sequence was arranged by The Simpsons composer <unk> <unk> and used in the Simpsons opening as well . Nicholas <unk> , known for <unk> a <unk> covers of famous songs on YouTube , performed the Simpsons theme song over the closing credits of " Exit Through the <unk> @-@ E @-@ Mart " . He was recruited after a staff member of the show saw his cover of the Simpsons theme on YouTube . 
