The Doctor stumbled slightly walking away from the crashed Cerebos. She was glad to find both Ryan and Graham in good condition, and, more importantly, alive. While her three friends got over the shock of each other being alive, her bladder decided to alert her that it had been three days. 'Oh brilliant,' she thought sarcastically.
'Of all the times to need the loo, it had to be another stupid sand-planet. Wait, not just a sand-planet, a deadly sand-planet!' the Doctor thought, in worry. She conjured up the confidence that she'd find her TARDIS soon enough, and pushed it aside.
By the third day, not only had she had her mind invaded by sentient textile ribbons, and found her TARDIS not to have phased "in" yet, but her need for the loo, had gone from "mildly annoying" to "positively bursting". The TARDIS must have sensed her despair, as she didn't get time to finish her apology to her friends before a faint vworp, vworp, vworp could be heard.. The second she said "I really need you right now", her faithful ship phased in, permanently. She didn't even need a key to get the door open! After setting the course for (hopefully) Sheffield, England, 2018, the Doctor jetted off to "check the Architectural Systems". More precisely, the bathroom. She found the sacred door, and the best wee in her new body, as of yet, at least. "New Rule 1:" she noted to herself. "Always go before teleporting to strange places!"