diff --git a/units/en/unitbonus5/introduction.mdx b/units/en/unitbonus5/introduction.mdx
index 43e4630..b83cf3f 100644
--- a/units/en/unitbonus5/introduction.mdx
+++ b/units/en/unitbonus5/introduction.mdx
@@ -1,5 +1,5 @@
 # Introduction:
-
+<img src="https://huggingface.co/datasets/huggingface-deep-rl-course/course-images/resolve/main/en/unit13/thumbnail.png" alt="Unit bonus 4 thumbnail"/>
 Welcome to this bonus unit, where you will **train a robot agent to complete a mini-game level using imitation learning.**
 
 At the end of the unit, **you will have a trained agent capable of solving the level as in the video**:
diff --git a/units/en/unitbonus5/the-environment.mdx b/units/en/unitbonus5/the-environment.mdx
index 7467387..b9d12d2 100644
--- a/units/en/unitbonus5/the-environment.mdx
+++ b/units/en/unitbonus5/the-environment.mdx
@@ -5,5 +5,5 @@
 The tutorial environment features a robot that needs to:
 
 - Pull a lever to raise the stairs leading to the second room,
-- navigate to the key 🔑 and collect it while avoiding falling down into traps, water, or outside the map,
-- navigate back to the treasure chest in the first room, and open it. Victory! 🏆
\ No newline at end of file
+- Navigate to the key 🔑 and collect it while avoiding falling down into traps, water, or outside the map,
+- Navigate back to the treasure chest in the first room, and open it. Victory! 🏆
\ No newline at end of file