Final answer:
The Watkins Committee attempted to end McCarthy's witch hunt by having him censured in the Senate and exposing his unsubstantiated accusations through televised hearings.
Step-by-step explanation:
The Watkins Committee attempted to end McCarthy's witch hunt by a) having him censured in the Senate for congressional contempt and defamation of members of the Senate and b) by exposing his unsubstantiated accusations through televised hearings.
In April to June 1954, the Army-McCarthy Hearings were televised, allowing the American public to witness McCarthy's use of intimidation and innuendo. McCarthy failed to provide any evidence of disloyal military officers and instead became the subject of an inquisition for an earlier attempt to secure a draft deferment for his supporter. The Senate officially condemned McCarthy's actions with a censure in December 1954, effectively ending his prospects for political leadership.