Invisible Muriel is the fourth episode of Season Two and the seventeenth episode in total. It aired on January 19, 2001. It follows Courage Meets the Mummy.
- First appearance of The Federal Agents.
- When Eustace is invisible the second time, Dr. Vindaloo tells him not to wear any clothes (except his hat and glasses). But when he was turned into a gold statue, he's wearing boxers possibly to cover up his lower regions due to censorship.
|Preceded by:||Episode 17 (2/2)||Followed by:|
|Courage Meets the Mummy||Invisible Muriel||Human Habitrail|