Four one-parters starring people the Doctor associates or has associated with, but haven't travelled with him as a companion to give them a Day In The Lime Light
Professor Bernice Summerfield
has been hired to excavate a deserted coal mine on a distant planet. She finds a TARDIS key. Guess whose? Yes, the Eighth Doctor turns up—but he's not the one Benny's sponsor is after.
Alien Defence Industries, Ltd., has a celebrity spokesperson: the Doctor. Or, rather, a poor simulacrum of the Doctor. Not amused, the Doctor turns up to put a stop to it. While he's being captured, Fitz convinces the media that he's the brains of the operation.
Izzy persuades the Doctor to take her back to her childhood, so she can get a super-rare comic.
On a summer night in 1816, Mary Shelley meets the Doctor.
- Acting for Two: The 8th Doctor acts opposite another version of the 8th Doctor.
- Call Back: This entire segment is one to Terror Firma where the Doctor mentioned he travelled with Mary Shelley. Samson and Gemma are mentioned as well.
- Continuity Porn: When the Doctor is rambling inside of the TARDIS he mentions Charley,
- Great Offscreen War: It is implied the future Eighth Doctor is from the Time War.
- Have We Met Yet?: The future Eighth Doctor knows who Mary Shelley is, having travelled with her for years. She is then met by the past Eighth Doctor, from his perspective his first meeting with her.
- Help Yourself In The Future: The future Eighth Doctor sends a distress signal which the earlier Eighth Doctor picks up, enabling him to heal his future self and TARDIS.
- Historical-Domain Character: It's Mary Shelly.
- Historical In-Joke: The Doctor's entire bout of madness seems to be an inspiration for Frankenstein the novel.
- I Am Not Shazam: Mocked when the Doctor says Frankenstein is the name of the Monster, not the Doctor, as his mutated future self calls himself Frankenstein.
- I Hate Past Me / Other Me Annoys Me: To say the two 8th Doctors don't get along is understating it.
- Lightning Can Do Anything: It is used to bring the future Doctor back to life.
- Mythology Gag: The entire scene where the Doctor is brought back with lightning reads like a direct page from Frankenstein including a "HE'S ALIVE!" (Though that is just from the movies)
- Timey-Wimey Ball: As Mary Shelly tells the Doctor "You do lead the most extraordinary and contrary life." His reply-"I know, it's more fun that way!"