Garbage collectors. IT support workers. Shelf stockers. There are so many "invisible jobs" out there, which help make lives run a little smoother. Today we're pulling back the curtain to make sure people doing the invisible work can finally be seen. When Warren Tse takes his seat at a Calgary Flames game, he's not just another fan cheering on the team. He's the maestro, high up above, using the keys of his organ to influence the crowd... even if they have no idea who he is. Working in collections for a call center requires a thick skin — just ask Lisa (to protect her privacy, we're using a pseudonym). What Lisa wishes you knew about the person on the other end of the cold call. And he's spent 17 years chasing bad guys who abuse children on the Internet. Stephen Sauer tells us what he wishes every parent knew.