Stingray - Season 1 - Eps 23: Eastern Eclipse
The de-throned Ali Khali, brother of evil dictator El Hudat (who is in Marineville Jail) visits Marineville. Meanwhile, Surface Agent X20 helps El Hudat to escape from his imprisonment by swapping Ali Khali, who has an exact likeness, in his place. Commander Shore discovers the switch so the Stingray crew and Ali Khali give chase.
About Stingray

Title: Stingray
First Air Date: 1964-10-04
Last Air Date: 1965-07-04
Status: Ended
Rating: 6.8/10 (from 17 votes)
Language: EN
Seasons: 2
Total Episodes: 40
Network: Associated Television
Genres: Action & Adventure, Sci-Fi & Fantasy
Production Companies: AP Films (APF), ITC Entertainment
Synopsis
A British children's Supermarionation television series.
Cast

Lois Maxwell
Lt Atlantis Shore

Don Mason
Captain Troy Tempest

Ray Barrett
Commander Sam Shore

Robert Easton
Lieutenant George Lee Sheridan