Almost six weeks since the disappearance of Nancy Guthrie (the 84-year-old mother of Today show host, Savannah Guthrie) the case which has shocked America remains unsolved. It's also led to a host of online amateur sleuths broadcasting their own investigations to a mass audience on TikTok, with many descending on Guthrie's home in Tucson, Arizona. Marianna has reached out to some of the people posting to discuss their motives, the issue of misinformation and the risk of undermining an active investigation. 

And, as TikTok montages from the official account of UK Prime Minister Sir Keir Starmer attract criticism and ridicule, why do established politicians often struggle to thrive on the platform? Matt has been getting the perspective of the strategists behind some of the most successful political campaigns on social media.

Top Comment is hosted by Marianna Spring and Matt Shea. The series producer is Laurie Kalus. The social producer is Sophie Millward. The technical producer was Rohan Madison. The editor is Justine Lang. The senior news editor is Sam Bonham.

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