Murph (on right) with her cousin, Ms. Frizzle.

Katrina Eloise "Murph" Murphy is Ms. Frizzle's first cousin who owns and operates a recycling plant. She teaches the class the value of recycling in the episode "Holiday Special". Just like the Friz, she has red hair. She loves recycling and hates seeing things being wasted.  She is voiced by Dolly Parton. She teaches Wanda and Arnold the importance of recycling after Arnold recycles Wanda's toy soldier by accident and Wanda develops a hatred towards recycling. She reminds them that many things called "junk" can actually be recycled to make something new.

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