meets Maeve Rourke, rivals with his cousin Tom for her affection
X-Force (1st series) #31
marries Maeve, summoned away to Interpol duty, Maeve dies before he can learn of their baby, blames Tom for Maeve’s death and injured him who them keeps Theresa’s existence secret
Deadpool (1st series) #2
one of his last Interpol missions
X-Men (1st series) #28
first appearance, manipulated by Factor Three in battling the X-Men, freed by Professor Xavier
X-Men (1st series) #35, 39
helps X-Men fight Factor Three, sonic scream exposes the supposed “Mutant Master” to be an alien
Giant-Size X-Men #1, X-Men (1st series) #94
asked to help rescue the X-Men from Krakoa, joins the new international team
X-Men (1st series) #96
introduced to Moira MacTaggert
X-Men (1st series) #101-103
inherits Cassidy Keep, him and the X-men are battled by Black Tom and the Juggernaut
X-Men (1st series) #129
overexhausts his power to stop Moses Magnum from sinking all of Japan
X-Men (1st series) #148
learns of his now adult daughter Theresa Rourke, who inherited his mutant powers from him
Uncanny X-Men (1st series) #217
helps to train some of the newer X-Men
Marvel Comics Presents (1st series) #17-24
infected with Retribution Virus, a disease targeted at mutants, cure designed by Moira kicks his system into overdrive, temporarily restoring his powers
Uncanny X-Men (1st series) #254
shot by the Reavers, saved by Amanda Sefton and the Morlock Healer, his sonic scream fully restored
Uncanny X-Men (1st series) #255-261
asks Forge to accompany him on a search for the missing X-Men, notes Moira behaving rather odd
Uncanny X-Men (1st series) #262-264
mouth erased by Masque of the Morlocks, genetically restored by Forge
X-Tinction Agenda
X-Men reunite
Muir Island Saga
Shadow King discovered to be the driving force between the oddities at Muir Island, forced to fight Moira and Siryn who are both under the telepath’s control
X-Men (2nd series) #4-5
Moira enters a personal crisis and runs away, Sean quits the team to follow her
X-Men (2nd series) #24
went vacationing when he found Moira didn’t need him, returns to X-Men, tries to rekindle relationship with her
X-Force (1st series) #35
visits Siryn with X-Force, offers her friendship instead of trying to act as her father
Deadpool (1st series) #4
arranges for Black Tom to receive medical treatment
forced to team up with Sabretooth, Jubilee and the White Queen to save a bunch of new mutants from the Phalanx
Generation X #1
he and Emma Frost become headmasters of new Massachusetts Academy to train Generation X
Generation X #25
Black Tom tries to kill Sean’s students for “having taken Theresa away” from him
Generation X #31
major disagreement with Emma on how to run things
Generation X #32, Excalibur (1st series) #115
visits Moira MacTaggert before she quarantines herself for her Legacy Virus research
X-Force (1st series) #91
shocked to hear of Siryn losing her power after a villain severed her vocal chords
Generation X #60-61
once more forced to fight Black Tom
Generation X #73
informed of Moira MacTaggert’s death
Generation X #75
turns to alcohol, Generation X disbands
Uncanny X-Men (1st series) #401
stops drinking, founds paramilitary X-Corps
Uncanny X-Men (1st series) #405-406
X-Corps infiltrated by Mystique, who stabs Banshee in the throat, crippling him
X-Men: Deadly Genesis #2-3
discovers Moira’s files about a secret X-Men team who Xavier sent to their death, is killed while trying to get the information to the X-Men
X-Force (3rd series) #21
briefly resurrected during the events of Necrosha as part of Selene’s undead army
Chaos War: X-Men #1-2
resurrected during the Chaos War with other dead X-Men. Helps defeat the Chaos King’s servant the Carion Crow
Uncanny Avengers (1st series) #10-13
resurrected by the Apocalypse Twins, using a Celestial Death Seed to serve as one of their Horsemen of Death. Battles Havok, Captain America and Wasp until he’s defeated and captured
Uncanny Avengers (1st series) #25
being held in statis by the Avengers while they try to find a cure for the Death Seed’s effects