Complex sentence: Needing better light in the medical facility, the Doctor sends Tegan and Turlough to fetch a portable mu-field activator and five argon discharge globes from the TARDIS but find that the ship's inner door is stuck, preventing them from getting beyond the console room.
Split into simpler sentences: Needing better light in the medical facility, the Doctor sends Tegan and Turlough to fetch a portable mu-field activator and five argon discharge globes from the TARDIS. However, once they arrive, they find that the ship's inner door is stuck, preventing them from getting beyond the console room.