to roam all alone on the shore

The pilot opens with a wealthy woman’s murder. The prime suspect is a man who is a patient of the woman’s husband, a doctor, for help with his mental disorder. The man is desperately trying to avoid any triggers that may cause him to become violent, as he has been in the past. The doctor decides to use this man as a tool to kill his wife to collect her life insurance. He manipulates both his patient and his wife, alters the man’s medications, and ignores the man’s pleas for help, in order to set a scenario that is guaranteed to trigger the man’s violence - resulting in his wife’s death and later his patient’s.

When Sherlock pieces this together, he confronts the doctor, which leads to this:

So, my dad's colleague was on a trip with their friends, who were a couple. Now, the wife of this couple was a huge U2 fan, and the highlight of this trip was going to a U2 concert. Later that night, after the concert, they went to a restaurant, and who do they see there at another table? Bono. The wife wants so badly to go and ask for an autograph, but in a typical Finnish fashion, she doesn't want to be a bother because surely Bono just wants to enjoy his night and not be surrounded by fans all the time, so she doesn't go.

Then, she notices that someone from Bono's table gets up and goes to the men's restroom, so she also gets up and goes to wait outside the men's room, until the guy comes out. She then stops him and goes excuse me, I saw that you were at the same table as Bono, would it be in any way possible that you could ask for an autograph from him for me? (because apparently it is much less mortifying to bother someone else you don't know than to bother the guy directly, I guess).

The man apparently kinda stands there for a moment, just looking at her, before he asks, sounding just a tad bit confused, if he heard her right. You want me to go and ask Bono for an autograph for you?

Yes, she says. She's being very polite about it. If you would be so kind. That would be great.

The man says yes, sure, I'll see what I can do about it.

They then part ways and go back to their own tables and continue the night, and some time later, they notice that Bono and the rest of the people who had been at that table have left.

Oh well, the wife thinks. No can do, maybe he just forgot or something or just didn't want to do it. It's okay.

They finish up their meal and ask for the bill. The waiter tells them that their meal has already been paid for, and then tells that they were left with two notes.

The waiter gives them the notes. They are both autographs. One of them says Bono.

"This bread is moldy in 5 days!"

Yeah, it doesn't have any preservatives. That'll happen.

"But the other company's bread lasted for 15 days without mold."

Right. They put calpro in it, which inhibits mold. You wanted bread without calpro, so it's going to get moldy faster.

Yes. That's pasteurization. Good job on discovering that it makes your milk safer and stay good for longer

Then one night he was coming home late and got mugged by a dude with a knife.

Apparently the look on the dude's face was amazing when he went in to gut the guy for his wallet and found out he was wearing medieval armor under his hoodie.