The Defenders Vol.1 (1972-1986) #78

Plot

While travelling from Las Vegas to New York, the Defenders, along with Wasp and Yellowjacket, intercept a distress call from a military base. When they land they thwart the attack but are later captured. At the same time, Dr. Strange, Namor and the Hulk travel to Tunnel-World to tackle the menace of the Unameable One.