The band "The Walking Dead" who wrote and performed several songs in the Upside Down TV studio, was played by the group "Siblings" from Ashbourne in Derbyshire. The guitarist is now an established producer and composer for TV and media called Bobby Eccles.
Vincent Reagan is only 4 years older than Louise Delamere, who plays his daughter.
Both this episode and the previous episode, "Peace and Love" have main characters with the last name "Hexton" - "Tony Hexton" in "Upside Down" and "Charles Hexton" in "Peace and Love".