The Cetus bounties Assassinate the Commander and Capture the New Grineer Commander both use the same dialogue for their main stages, and effectively seek to accomplish the same goal: eliminating a new Grineer officer. They have been combined together and presented here. The Assassinate, Cache Recovery, Capture, Exterminate, or Rescue stages do not seem to appear on either of these bounties, with the exception of the end stages, which are always Assassinate and Capture, respectively (as the names of the bounties would suggest).
Assassinate the Commander has the following description: "A Grineer leader will only show their face if we disrupt Grineer operations across several fronts." Capture the New Grineer Commander is described as "A new Grineer commander has been no end of trouble. Capture them."
Konzu: "New Grineer boss-man's been givin' us no end of trouble. You're my go-to Tenno. Make him go away, yeah?"
Lotus: "Konzu is right. We must create chaos to draw this Grineer Commander into an open fight."
Lotus: "I'm tracking a Grineer drone with information about our target. Bring it to me."
(upon completing the stage) Lotus: "The drone is ours. Analysing data stream. [pause] Excellent, a possible lead."
Lotus: "Seized intelligence has revealed the location of the Commander's camp. Liberate it from him."
(upon completing the stage) Lotus: "We've captured the camp. The Commander has retreated to a new position."
Lotus: "The Commander has requested a supply drop to quell unrest among his troops. Intercept the drop to keep them on edge."
(upon completing the stage) Lotus: "Radio chatter indicates falling morale within the Grineer ranks. That's bad news for the Commander."
Lotus: "Our target is about to receive pieces of a communications array in a supply drop. Interrupt the drop and destroy the equipment."
(upon completing the stage) Lotus: "Their comms just lit up. They're not happy about what you just did. Let's keep it that way."
Bounty end: Assassinate the Commander (Assassination)
Lotus: "The Commander is in the area. Scanning… he's hiding. Okay, Tenno, see if you can draw the Commander out."
(upon completing the bounty) Konzu: "Lights out for boss-man. You're off the clock, Tenno."
Bounty end: Capture the New Grineer Commander (Capture)
Lotus: "I've located the Commander. He's moving on foot. Intercept and bring him in alive."
(upon completing the bounty) Konzu: "Good work, Tenno. I'm about to show boss-man some Ostron 'hospitality' [laughs]. Sho-lah."