There are total of 10 Missions. Here is a List with Name, Objective and Bonus Objective. Below is a Video and the Timeline.
The Mithril BladeObjective: Stealth Kill 10 Slavers in 3 Minutes
Bonus Objective: Avoid detection
Clear the SkiesObjective: Stealth Kill 10 Archers without setting off the Alarm
Bonus Objective: 5 Ledge Kill Uruks
The WraithObjective: Stealth Kill 5 Uruks without being detected
Bonus Objective: Kill 3 Uruks with Strike from Above
Deathly WhisperObjective: Kill 5 Uruks while they investigate your Attract position
Bonus Objective: Avoid detection
Display of PowerObjective: Brutalize the Guard without setting off the Alarm
Bonus Objective: Stealth Kill 5 Uruks
The Darkness WithinObjective: Reach Executioners watch without being detected / Stealth Brand the Archers without being detected / Kill the Uruk Patrol
Bonus Objective: Kill no one until the ambush is set
A Knife in the DarkObjective: Kill all Uruks without being detected
Bonus Objective: Stealth Brand 3 Defenders
The Scouring of the ShadowObjective: Avoid detection and eliminate Uruk Teachbearers near each Ghûl Nest
Bonus Objective: 5 Attract or Distract then kill Uruks
Fatal SecretsObjective: Follow the Messenger and eliminate the Worms without being detected / Eliminate the Messenger
Bonus Objective: Kill 2 Uruks with Lethal Shadow Strike
Shadow and SteelObjective: Stealth Kill 5 Defenders without raising the Alarm
Bonus Objective: Kill 3 Uruks with Strike from Above
00:14 - The Mithril Blade
01:50 - Clear the Skies
05:03 - The Wraith
06:32 - Deathly Whisper
07:56 - Display of Power
09:12 - The Darkness Within
13:05 - A Knife in the Dark
15:24 - The Scouring of the Shadow
18:56 - Fatal Secrets
22:14 - Shadow and Steel
24:27 - Dagger View