They Came from Outer Space: Part 1 is the first episode of the second season of the animated series, Martin Mystery. It was originally released on October 28, 2004 and also was the continuation of the second part of the episode.
People living in New Mexico near the Los Lunas nuclear power plant wake up missing hair and teeth and also seem to be appearing in two places at once. When Martin, Diana & Java arrive to investigate they find some evidence of alien involvement that freaks Billy out and forces him reveal his hidden past as Ganthar, the leader of a gang of extraterrestrial pirates.
- Freeform Aliens
- Slime Scan (2x)
- The security guard's quote saying, "What's up, Chuck?" was similar to Bugs Bunny's famous quote, "What's up, Doc?" from the Warner Brothers' Looney Tunes and Merrie Melodies cartoon series and also the late director and animator, Chuck Jones.
- It bears the same topic and genre as an American science fiction comedy series, They Came from Outer Space.