A man travels back in time to help people in trouble

http://imdb.com/title/tt0948538/

http://en.wikipedia.org/wiki/Journeyman_%28TV_series%29

http://www.nbc.com/Journeyman/

a really good show thats probable not going to have a seconded season

Alas, you're words proved prophetic. Though I enjoyed JM myself, the end was for the best perhaps, as co-existence alongside The Time Traveler's Wife would've probably made grounds for ribbing prime <_< If not a lawsuit or two....