Batman Season 2 Episode 30

The Dynamic Duo hum the chamber's F sharp above high C sympathetic vibration, which causes the echo chamber's glass walls to break, releasing them; they immediately race to the site of Chad and Jeremy's concert it's too late as Catwoman has already stolen their voices. She later appears on The Allen Stevens Show, where she announces her demands: $22,440,000 in order to ransom Chad & Jeremy's voices. The British Consul refuses to pay the ransom and so The Caped Crusader and The Boy Wonder must shadow The Catwoman to her new lair and recover the voices.
Tracing her to Mr. Oceanbrig's Hair Salon, Batman and Robin capture Eenie, Meanie, Miney and Moe but lose Catwoman. Batman chases Catwoman to a deserted alley where she pounces on him and threatens to liquidate him with a sonic gun! Apprehended by The Caped Crusader, she reveals to him how to restore the voices of Chad and Jeremy. Bruce Wayne and his brood end with enjoying Chad and Jeremy's concert with Commissioner Gordon and Chief O'Hara.