Terrific was very similar in format to Fantastic, which had started publication two months earlier. The two titles were quite unlike other British comics of the time, consisting mainly of material reprinted from American Marvel Comics. In this respect they can be considered a precursor of the Marvel UK weeklies, such as The Mighty World of Marvel, that appeared during the 1970s. The Marvel titles which were reprinted in Terrific included The Avengers, the Doctor Strange strips from Strange Tales, and the Sub-Mariner and Giant-Man strips from Tales to Astonish.