Unchained Reaction

{{Short description|Television series}}

{{Use mdy dates|date=March 2025}}

{{Infobox television

| image = Unchained Reaction logo.jpg

| genre = Reality
Science

| creator = Adam Savage and Jamie Hyneman

| starring = Adam Savage
Jamie Hyneman
Charles Haine

| narrated =

| composer =

| country = United States

| language = English

| num_seasons = 1

| num_episodes = 6

| list_episodes =

| location =

| camera =

| runtime =

| company = Discovery Studios
BermanBraun

| executive_producer = Adam Savage
Jamie Hyneman
Daniel Soiseth
Lloyd Braun
Gail Berman
Gene Stein
David Pritikin
Tracy Rudolph

| network = Discovery Channel

| first_aired = {{start date|2012|3|18}}

| last_aired = {{end date|2012|5|3}}

| related =

}}

Unchained Reaction is a science and engineering reality game show that aired on the Discovery Channel. It was judged and executive-produced by Adam Savage and Jamie Hyneman, best known for hosting the science entertainment series MythBusters.

The series premiered on March 18, 2012.{{cite press release|title='Mythbusters' Jamie Hyneman & Adam Savage To Exec. Produce New Discovery Channel Series, 'Unchained Reaction'|url=http://tvbythenumbers.zap2it.com/2012/01/20/mythbusters-jamie-hyneman-adam-savage-to-exec-produce-new-discovery-channel-series-unchained-reaction/117202/|archive-url=https://web.archive.org/web/20120124030004/http://tvbythenumbers.zap2it.com/2012/01/20/mythbusters-jamie-hyneman-adam-savage-to-exec-produce-new-discovery-channel-series-unchained-reaction/117202/|url-status=dead|archive-date=2012-01-24|publisher=Discovery Channel|date=2012-01-20|access-date=2012-01-20}}{{cite video|title=Unchained Reaction Sunday March 18th @ 10pm * |url=https://www.youtube.com/watch?v=X8z2lnAkpkE|publisher=Discovery Networks|date=2012-02-23|access-date=2012-02-25}} The show pits two teams of various backgrounds against each other to build an elaborate chain reaction contraption (sometimes also referred to as a "Rube Goldberg" machine or device). Teams are provided with identical sets of tools and materials and are given five days to construct a series of mechanisms based on a predetermined theme. Midway through each week, the teams are provided with a surprise "missing link" item that they must add to the middle of their machines. The winner would be selected by Savage, Hyneman, and a guest judge.