Travelling by TARDIS was always an adventure. Even when the Doctor chose a destination and set course for it, there was no absolute guarantee that’s where they’d end up, because the TARDIS was sentient and had a mind of her own.
Even so, when the Doctor said they were going to a planet called Mistlethwip and instead they stepped out into the gateroom at Stargate Command, Donna was flummoxed.
“Bloody hell! You took a wrong turn somewhere, Spaceman! I watch this on TV.”
“This is so cool!” Carter exclaimed. “I’ve never met fictional characters before!”
“Oi! You’re the fictional one!”