This alter ego originally appeared in a storyline from 1969, in which Lucy spitefully throws Schroeder's piano up into the Kite-Eating Tree. In the strip from January 25, 1969, Snoopy appears wearing a firefighter's helmet, and is identified by Charlie Brown as the "Captain of the Rescue Squad." He tries to climb the tree to retrieve the piano but falls out, landing on his head.
In a storyline from 1974, the alter ego returns when Lucy spitefully throws Schroeder's piano down a sewer. In the strip from October 9, 1974, Snoopy appears wearing a hard hat, now identifying himself as the "World Famous Member of the Emergency Rescue Squad." As the piano floats downriver Snoopy begins to enter the water, but quickly turns back when he discovers that it is cold.
On each occasion, Snoopy fails to retrieve the piano, and Schroeder is forced to order a replacement one.