Ultraman Dyna (ウルトラマンダイナ, Urutoraman Daina) is a Japanese tokusatsu TV show which aired from 5 September 1997 until 28 August 1998.

Shin Asuka has just joined Super GUTS and is in the middle of training maneuvers above Earth's atmosphere when he and his comrades are attacked.

When the Spheres enter Mars' atmosphere and merge with the Martian rocks to form monsters, Shin again participates in the battle, now equipped with a mysterious device known as the "Lieflasher".

Eleven years after the end of the television series, the movie Mega Monster Battle: Ultra Galaxy establishes Shin's survival, and the Ultraman Saga had him briefly reunited with the rest of the Super GUTS before vanishing.

Factory announced to have struck a multi-year deal with Alliance Entertainment and Mill Creek Entertainment, with the blessings of Tsuburaya and Indigo, that granted them the exclusive SVOD and AVOD digital rights to the Ultra series and films (1,100 TV episodes and 20 films) acquired by Mill Creek the previous year.