Dónal Finn as James Moriarty and Hero Fiennes Tiffin as Sherlock Holmes in 'Young Sherlock.' Courtesy of Prime Video Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment Logo text The game remains afoot at Prime Video. The Amazon-owned streamer has renewed Young Sherlock for a second season.