Mouse P.I. for Hire To Catch a Mockingmouse Walkthrough

This guide explains how to complete To Catch a Mockingmouse in Mouse: P.I. for Hire, including how to explore the River Fever Line and find every collectible location in the level. If you're stuck progressing through the River Fever Line, this walkthrough covers all steps along the way.

You can collect every To Catch a Mockingmouse collectible in a single run with no backtracking, including a Comic Book needed for 100% completion.

You can start two side jobs, Between Alpha and Omega and Mouseburg Confidential, while exploring the River Fever Line during To Catch a Mockingmouse.

How to Complete To Catch a Mockingmouse in Mouse: P.I. for Hire

Key Objectives

• Get a BMP Membership Card.
• Find the Storage Room Key, the Cabin IX Key, and the Captain's Key.
• Photograph the Unfaithful Wife for Between Alpha and Omega and the Suspicious BMP Members for Mouseburg Confidential.
• Photograph Cpt. Simms and defeat him.
• Abandon ship.
• Pin your clues back at the P.I. Office.

To Catch a Mockingmouse Walkthrough (All River Fever Line Collectibles)

Follow the steps below to progress through the mission and find each item in order. For help with other jobs, check our complete walkthrough and collectibles hub.

All To Catch a Mockingmouse Collectibles

There are five collectibles in To Catch a Mockingmouse. The list below shows the full breakdown.

• Comic Books: 1
• Schematics: 4
• Total Collectibles: 5

Get Close to Cpt. Simms

Leave the engine room and climb the stairs to approach the Banquet Hall I / Kitchen I door. Talk to the Bouncer you find there.

Get the BMP Membership Card

Comic Book

Head left and follow Deck I toward the Banquet Hall I door. Climb down the stairs just before that door, and follow the deck to reach a Grapple Tail point you can use to cross a gap. Enter the bathroom on your left beyond the gap and grab the Comic Book that is on the toilet.

Backtrack and use the stairs to return to Deck I. Climb the stairs in front of you to reach Deck II and pass through the Cigar Room II / Cabins V-VI door that is north and to the left. Now enter Cabin VI on your right and pass through the vent in the room to reach Cigar Room II.

BMP Yes-Man

In Cigar Room II, talk to the BMP Yes-Man near the entry door to start the Between Alpha and Omega side job. Now climb the stairs and grab the BMP Membership Card from the table in the northeast corner of the room.

Show the Card to the Bouncer

Undercover Agent

Use the door near the typewriter to exit to Deck III. Climb down the stairs and talk to the Undercover Agent at the bottom to start the Mouseburg Confidential side job.

Schematic

Head south and climb up the staircase at the end of the deck. Climb the stairs on your right to enter the area with the band, and get behind the curtain at the back of the stage to find a Schematic.

Suspicious BMP Members

Head to the northwest corner of the area with the band and photograph the Suspicious BMP Members. For more info about this photo, see our Mouseburg Confidential side job walkthrough.

Unfaithful Wife

Leave the band area and head back down to the Undercover Agent on Deck II to complete Mouseburg Confidential. Then travel south once again and go down the stairs on your left to reach Deck I. Look through the second window on your right to photograph the Unfaithful Wife. For more info on this photograph, see our Between Alpha and Omega side mission walkthrough.

Now climb back up the stairs, turn around, and enter the corridor that is forward and to your right. Enter the door on your left and use the vent in Cabin VI to return to Cigar Room II. Talk to the BMP Yes-Man to complete Between Alpha and Omega.

Go upstairs and leave the Cigar Room again. Descend two flights of stairs to return to where you photographed the Unfaithful Wife, and pass through the door that is ahead. Follow the path to the Bouncer, who will open the door that is next to him.

Now make your way down the hallway, enter the last room on your left, and slide through the crack in the wall. Cross the hallway and use the vent to enter Kitchen I. Use the Warp-Pipe in the kitchen to teleport to Kitchen II.

Storage Room Key & Schematic

Look to the door on the north side of the room. The Storage Room Key is hanging on the hook to the left, and it can be used to open the locked door in Kitchen II. Enter the Warp-Pipe past the door and grab the Schematic on the table.

Cabin IX Key

Now pass through the hallway with the safe and grab the Cabin IX Key from the desk in the room. Backtrack through the Warp-Pipe to return to Kitchen II.

Captain's Key

Exit Kitchen II through the door on the north side, and use the Cabin IX Key to unlock the door to your left. Go through the vent and fall through the hole. Collect the Captain's Key that is sitting on top of a book.

Schematic

Leave the room, follow the hallway, and head left when you reach the deck. Turn around and climb the stairs in front of you to access the area that you have visited when exiting the Cigar Room. Look right and head through the open door to reach a door that is unlocked with the Captain's Key. Tailpick the safe in the room to get a Schematic.

Follow the main path to return to Kitchen II and use the door on the south side to enter Banquet Hall II.

Snap a Damning Photo of Cpt. Simms, Deal with the BMP Enforcers, & Defeat Cpt. Simms

Approach the broken part of the balcony and take a photo of Cpt. Simms. Defeat the enemies that appear in the room. Jump out the window and use the turrets on the deck and your Loose Cannon to bring down Simms's plane.

Run for Your Life & Abandon Ship

Schematic

Head down the ramp. Continue along the fiery path and look for a Schematic in a cage next to a flaming car.

Stick to the path to reach the Steering Room and use the Emergency Inflatable Water Plane at the top of the stairs to leave the River Fever Line.

Wrap Up the Case with Corny and John & Pin Your Remaining Shrew Shortage Clues

Back at the P.I. Office, talk to John and Stilton inside the Little & Big. Then enter Jack's office and pin your clues to the Crime Wall to complete To Catch a Mockingmouse. If you're headed to the Reel Deal next, make sure to use our Fatal Repulsion by Tinsel Bros collectibles walkthrough to find everything there.

FAQ

How many collectibles are on the River Fever Line?

There are five collectibles in To Catch a Mockingmouse: one Comic Book and four Schematics. There are also two side missions to complete there.

Are River Fever Line collectibles missable?

After completing To Catch a Mockingmouse, you cannot return to the River Fever Line for any collectibles you missed. However, missed Newspapers, Comic Books, and Baseball Cards can be purchased from the Soup to Nuts (P.I. Office area) or Roadhouses.

More Mouse P.I. for Hire Collectible Guides

• Swamp Oddity walkthrough collectibles
• The Bookkeeper by Tinsel Bros walkthrough collectibles
• Fatal Repulsion by Tinsel Bros walkthrough collectibles