Further Adventures of Cyclops and Phoenix is a four-issue comic book mini-series published in 1996 by Marvel Comics.

The series is a sequel to the Adventures of Cyclops and Phoenix (1994), and was written by Peter Milligan with pencils by John Paul Leon and inks by Klaus Janson.

The X-Men members Cyclops and Phoenix are brought to Victorian era England in the year 1859, where the scientist Nathaniel Essex, obsessed with Darwin's theory of evolution, encounters the centuries-old mutant Apocalypse who transforms him into Mister Sinister. ^[1]

A trade paperback was produced some time after the mini-series finished publication collecting it into one 96 page volume released in October 1997 (ISBN 0-7851-0556-5). However, it was produced during a period of economic decline for Marvel, and before trades had reached the popularity they would a few years later, and has thus been left out of print.

In the year of 2018, both miniseries were collected into a single paperback.

• The episode "Descent" of X-Men: The Animated Series details the origin of Mister Sinister and is loosely based on Further Adventures of Cyclops and Phoenix miniseries.