Required Characters: Imperial, Jedi/Sith, Lando
Canister 1: Near the Control area. There's a set of bricks at the bottom of the ramp. Build them into an Astromech Panel. Enter the room. The Canister sits in the middle.
Canister 2: If you follow the normal Story Path. It's sitting in the back corner of the large room before the buildable bridge.
Canister 3: Head past the split and continue to the right. It's sitting in the back corner of this small Dining Area.
Canister 4 (Lando): After deactivating the Force Field, build the pieces here into a Bespin Panel. Activate it and enter the Ventilation Station. Build both sets of pieces here into bridges, them Jump between them for the Canister.
Canister 5: It's sitting in the corner after deactivating the Force Field. Pretty hard to miss.
Canister 6: Enter the Mess Hall by going straight ahead. It's sitting in the corner.
Canister 7 (Jedi/Sith): Enter the Death Star Control Room through the big door here. Go all the way through, and Jump up to the higher level at the Hangar dock. It's sitting up here.
Canister 8: In the corner of the last room, are a set of bricks. Build them into a platform, and use them to reach the Canister.
Canister 9 (Lando): Head to the left side of the Detention Block and follow the path. Build the pieces into a Bespin Panel and use it. The Canister sits inside this cell.
Canister 10 (Imperial): On the right side, head down the path and build the Imperial Panel. Use it and grab the Canister inside.
Unlocked Character: Imperial Navy Lieutenant (5,300)