The story featured Nardole's first appearance in the ongoing Twelfth Doctor comic series, although his first comic appearance was in COMIC: The Lost Dimension. It also featured Missy's first appearance in the ongoing comic series.
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- Bill convinced the Doctor to watch Back to the Future. However, all the Doctor can do is criticise the portrayal of time travel in the film.
- It's implied the Doctor finds Everlasting Gobstoppers from Charlie and the Chocolate Factory, saying he knew that they made matches, but not Gobstoppers.
- The Vault has a dimensional stabiliser.
- Pathicols feed on the empathy of others.
- The Doctor likes Nanjura fruit juice.
- Nanjura fruit juice shouldn't be given to Silurians.
- The robots at the Übermarket begin sentences with a phrase between two plus signs (e.g. "+Statement+"). In one panel, it mistakenly begins with two plus signs ("++Directive+")
- The Doctor mistakenly refers to Marty as "Morty". Bill replies saying "Morty's a whole other thing", a reference to Rick and Morty.
- The Doctor would quote Back to the Future by saying "Great Scott!"
- The Doctor quotes Star Wars in saying "Boring conversation anyway".
- The Doctor mentions that he's crossed his own time stream, and there were "Reapers everywhere! Vicar set upon! TARDIS kaput!" (TV: Father's Day)
- Missy was let out of the Vault and into the TARDIS once before. (TV: Empress of Mars)
- Raxacoricofallapatorians (TV: Aliens of London / World War Three et al), Trees of Cheem (TV: The End of the World), Thomas Kincade Brannigan and Valerie Brannigan (TV: Gridlock) are shopping at the Übermarket.
- Deserts, sweets, and pudding sign reads "Wibbly-wobbly, limey-wimey jelly." (TV: Blink et al)
- "Impossible soufflé grills" are on sale at the Übermarket. (TV: Asylum of the Daleks, The Snowmen et al)
- Bill tells Olivia Gowland that she lost her mother. (TV: The Pilot)
- The Doctor finds Jelly Babies at the Übermarket. (TV: The Dominators et al)
- The Doctor says Bill smiles when she doesn't understand something. (TV: The Pilot)
- The Doctor doesn't like the Übermarket robots due to their similar shape to the Daleks. The robots say "Seek! Locate! Restrain!", similar to the Daleks' "Seek! Locate! Exterminate/Destroy!" (TV: Destiny of the Daleks et al)
- Heather is keeping an eye on Bill (TV: The Pilot)
- Nardole says "Carrot juice, carrot juice, carrot juice..." (TV: The Ultimate Foe)
- Bill finds Nanjura juice, but the Doctor warns not to give it to Silurians because it is toxic to them. (COMIC: Supremacy of the Cybermen)
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