The Clarkov Won't Surface! Part 1 (移動要塞（クラーコフ）浮上せず!（前編） Kurākofu Fujō Sezu! (Zenpen)) is the twenty-fifth episode of Ultraman Dyna.
- Ultraman Dyna
- Flash Type
- Ultraman Dyna Volume 7 features Episodes 25-28.
- This episode, along with the next one, was featured in New Ultraman Retsuden episode 82 "Dyna Defeated!? The Clarkov Will Not Surface!".