Tom calls the exterminators, but they send a cat, who despite his various tools, doesn't fare much better than Tom usually does.
Practical Effects
Rube Goldberg traps that somehow get MORE complicated with professional help.
Sound
Hanna's screams — the original ASMR for cartoon violence.

Director
William Hanna
Trivia, insights & behind the scenes
This was the 20th Tom and Jerry short — Hanna and Barbera were still figuring out how much pain was too much pain. (Spoiler: there is no limit.)
The 'incompetent professional' trope here directly influenced decades of slapstick, from Wile E. Coyote's ACME disasters to modern sitcoms. Jerry's undefeated streak is basically a superpower.