Most Helpful Girl
"Jack Bauer asks a few times "where's my wife and daughter" and it got me confused 'cause I thought it should be "where are my wife and daughter""
You're correct, it should be "where are".
"Where's" is a contraction of "Where is". Technically, the contraction for "Where are" is "Where're". However, "Where're" is kind of awkward to say and personally, I've never heard/seen anyone use "Where're". People would normally just say, "Where are", since the "Where are" and "Where're" sound almost identical and you aren't really saving any time by using the contraction.
In an informal conversation, if you used "Where's my wife and kids?", I don't think many native English speakers would really notice the fact that it's technically incorrect. I've heard many people use "Where's" this way. In a formal setting (for example, if you're writing for school or your job), you should probably use "Where are".