Possible Clues:

• Where actor Momoa appears at the end of "Aquaman"?
• Eavesdropped
• Listened to accidentally
• Picked up
• Secretly listened to conversation about said cows
• Caught up, having run in
• Statement of beliefs could be part of mediocre doctrine?
• Caught up crossing river
• In charge of animals, reportedly - as picked up by snooper?
• Picked up second bit of broadcast with external aerial?