I just realized I accidently did 122 on chapter 3 and I know chapter 4 doesn't actually end with a B, but come on, points for inventing a word. Sort of.
When I first saw this episode, and saw Sherlock driving, I thought 'how the heck did Sherlock get into the driver's seat?' I imagine their conversation went something like this, only longer and more violent maybe. So this isn't 221B but whatever
When they arrived at Baskerville, Sherlock rented a large black SUV to take them around in. He threw hid bag into the back seat before starting to climb into the driver's seat.
"Hold on, Sherlock, what makes you think you're driving?" Sherlock stopped and looked at John for a moment.
"I paid for it, I get to drive it."
"Do you even know how to drive?"
"Of course, yes, and I have a current license," Sherlock replied impatiently. "Now can we please get going?"
"I really don't know if I trust you behind the wheel, Sherlock," John argued. "Just let me drive."
"No." John took on a firm stance.
"Sherlock, you make me get your phone for you out of your own pocket! Now you won't let me drive? What's wrong with you?"
Sherlock pursed his lips into a firm line. "If you want to drive, get your own car." He then got into the seat and shut the door.
"Sherlock!" He started the engine. "SHERLOCK!" He started backing up. "Okay, OKAY! I'll let you drive!" Sherlock smirked and let me into the passenger's seat.