Mickey has had several adventures with The Doctor and Rose.He was instrumental in destroying the Slitheen in the two-parter Aliens Of London and World War Three,he hacked in launched the missiles.He came up aginst the Slitheen again Boom Town.
In The Christmas Invasion he protected Rose and Jackie from the pilot fish while the Doctor recovered from his regeneration.He alerted Rose and The Doctor to Strange goings on in School Reunion,and then joined the Tardis crew for The Girl in The Fireplace and the Cyberman two parter staying in the alternate universe when that universe's version of him was killed.