Radio Harrow presents a 4th Sonic themed special to celebrate the 30th anniversary of Sonic CD with the returning hosts as well an audio drama where Sonic and Tails go on a quest to find their friend Amy Rose who was kidnapped.

It is a sequel to the hit Sonic Special 3 and contains a full-length audio drama titled Case of the missing Rose - where Sonic, Tails, Cream and Cheese embark on a rescue mission to find their friend Amy Rose who's been kidnapped. question is , who did it?. Andrew Hamblin, Sydney Paige, Doom the MemeQueen, Boyle Voices, CashlinSnow, Emcee Voices and Adam Ward return to reprise their roles from the previous specials, while Noah Dufresne, Coryn May, Naze VA, Tom Hayle, Heavenly Angie, Vibripple, James Gouvis join the cast to voice new characters. DietDrKelp and The Ultimate Voice Actor who voiced in the previous specials also return to voice new cameo roles. Just like the previous shows it contained talk topics, songs, a quiz and an original audio drama. The poster artwork was drawn by Sonic IDW comic artist ARQ and the YouTube remix Sonic Jamz: Look-A-Like (KB Remix) Ft.PaiDA was also featured at the end of Special.