Marvel Two-In-One, Vol. 1 #28A (1977)

In The Power of the Piranha!
Ben volunteers to take Deathlok to London to get Professor Kolt to remove the Fixer's mind control device, and take a detour into a vacation with Alicia. Unfortunately, an encounter with Namor and a school of intelligent pirahnas alters those plans rather dramatically.
Release Date: 1977