A time machine is a possible device that is capable of travelling through time, thus presenting the oppurtunity of travelling into the past and changing the course of future events thus altering history. When Josh and Pete were sentenced to very long detentions by Mr. Whiteside, Brian suggested that Josh should use a time machine to alter the past events. An amazed Josh asked Brian if he knew how to make one, only to be told by him that he could not, Brian himself asked if they even existed. (Crazy for You)
- Indeed, time travel has never appeared in My Parents Are Aliens beyond this brief mention.