Mass Effect 2/The Professor

The Afterlife
It's time to head to Omega to collect the first of three potential squad mates, Mordin Solus. Use the galaxy map in the Normandy's CIC to find yourself in the Sahrabarik system. Fly to and dock with the Omega space station. Upon landing, you'll find the mercenary Zaeed Massani "persuading" a batarian to talk. You can pick him up for your squad or just ignore him for now — we'll get to his quest soon enough (access to Cerberus Network required for Zaeed Massani). For now follow Moklan's advice and head straight for the Afterlife club.

Inside the club you can find a bartender off to the right. You can purchase the bottle of Serrice Ice Brandy at the bar for the associated sidequest if you wish. Make your way up the stairs in the back to Aria's lounge. You can discuss quite a bit with her, but we're just interested in the whereabouts of our missing professor. When you've got a fix on him, head back out of the club and off to the marketplace.

In the lower level of the marketplace you can find Kenn, a quarian merchant who's got himself in a bit of a bind with the elcor merchant Harrot. Help him out if you're interested and check his kiosk for the T6- FBA couplings your engineers need. To the east of where you entered the marketplace is the pathway to the slums, and Professor Solus. Talk to the guard to get through and to the slums.

Model Scientist Salarian
Up ahead, behind some crates is a container of element zero. Follow the path into Goza District and take out the Blue Suns members blocking a door near the bank terminal. Beyond the door are some power cells. Back outside you can hack the terminal for some quick cash. Continue along the path, stopping to talk to the sick batarian. Pressing him for info on the professor may give you the option for a paragon interrupt, giving him a bit more life and a promise that you'll tell the doctor of him. After you pass the batarian, hack open the door to your right to find a safe with a nice sum of credits waiting. Continue on to the mess hall for another firefight with Blue Suns. Near the exit to this area, search a turian corpse for an assault rifle upgrade.

Beyond the door you'll come under fire from the Blood Pack. Taking the stairs just right of your entrance will lead you to a balcony that should give you the advantage of high ground. A well placed sniper shot from here can even kill enemies behind cover. A small room off of this area contains an element zero container. Beyond yet another door here is the apartment of a dead turian. You can pump the looters here for information, persuade them to stop looting, or stop their looting with a chunk of hot lead between the eyes; your call. Head back to the foyer and continue to follow the path.

Once in the clinic, find Mordin and enter the room across from him. You can "liberate" the contents of a med kit and containers of platinum and palladium. There's also research data here for increasing your medi-gel capacity. In Mordin's office/exam room are another med kit, containers of iridium and element zero, and power cells. With your pockets full, go ahead and speak with Mordin. He agrees to join you, but only if you can help him distribute his cure for the plague.