According to Andrew Sandoval's The Monkees: The Day-by-Day Story of the 60s TV Pop Sensation, "Monkee Chow Mein" - the twenty-sixth episode of The Monkees series - was broadcast fifty years ago to-day (13 March 1967). It was written by Gerald Gardner and Dee Caruso, directed by James Frawley, and featured the song "Your Auntie Grizelda." Sandoval describes the plot as: "During a visit to a Chinese restaurant The Monkees get tangled up in a plot to unleash the dreaded Doomsday bug."
In the book, the episode title is given as "Monkees Chow Mein," but on the DVD, it's "Monkee Chow Mein."