10 Doctor Who Episodes That Should Have Been Two-Parters
9. The Doctor's Daughter
The Doctor's Daughter is one of the slightly weaker episodes in the brilliant Series 4, but it does have a really intriguing character at its core that, given more time, could have been way more memorable. That character is Jenny, the Doctor's biological daughter who was artificially created by a Progenation Machine, which used a sample of the Doctor's DNA to create a brand new lifeform. Amusingly, Jenny's actress is the real-life daughter of Fifth Doctor actor Peter Davison, and went on to marry Tenth Doctor actor David Tennant.
She does a great job in the role and she's instantly charming, but to be honest she doesn't have much of a character. She's friendly, upbeat, inquisitive -- everything you'd expect a descendant of The Doctor to be -- but she doesn't exhibit any interesting flaws or motivations. If this story had been a two-parter, Jenny's character could've been a lot more fleshed out and complex, which would have made her far more impactful. Perhaps that would have been enough for us to see her return to our screens, rather than disappearing at the end of the story and never being seen again. The rest of the episode could've done with more time too: there's some fascinating worldbuilding around the planet Messaline, and it would've been great to see more time dedicated to it.