The Doctor's universe
- The ninth episode of the series was a crossover with The Sarah Jane Adventures.
- This CBBC series had its own crossover with Chute! in the latter's first episode.
- This CBBC series had its own crossover with Chute! in the latter'd twelfth episode.
- Had numerous crossovers with the DWU via such stories as The Totally Stonking, Surprisingly Educational And Utterly Mindboggling Comic Relief Comic [+]Loading...["The Totally Stonking, Surprisingly Educational And Utterly Mindboggling Comic Relief Comic (comic story)"] and Dermot and the Doctor [+]Loading...["Dermot and the Doctor (TV story)"].
- A 2021 episode of Coronation Street made a direct reference to a concurrent Holby City storyline as part of a campaign among all British soap operas and ongoing dramas to highlight climate change.[1]
- Had numerous crossovers with the DWU via such stories as Mistaken Identity [+]Loading...["Mistaken Identity (short story)"] and Dimensions in Time [+]Loading...["Dimensions in Time (TV story)"].