Unraveling The Past What Years Did Mash Actually Run

The Show That Outlasted Its Network

M*A*S*H was a television event in ways that still confuse people decades later. The numbers get misquoted constantly. The show first aired on CBS on September 17, 1972, and its final episode, "Goodbye, Farewell and Amen," played on February 28, 1983. That is eleven seasons, one hundred and seventeen episodes in the original broadcast run before the hospital shut down for good. There is a persistent myth that the show ran for ten seasons. It did not. It ran for eleven. The confusion likely comes from the fact that season 11 was truncated — only nine episodes instead of the usual twenty or so — which makes it feel shorter than it actually was on a calendar basis. If you count from premiere to finale by air date, you are looking at roughly ten and a half years of weekly programming.

Unraveling The Past What Years Did Mash Actually Run

The practical takeaway here is straightforward. M*A*S*H ran from 1972 through 1983. That is the full span. The pilot movie, which starred Alan Alda in a slightly different tone and had a different runtime, aired in 1970, but that was a standalone television movie, not part of the series itself. Some people fold that into the timeline, which stretches the count, but the actual series launch is 1972. One thing nobody seems to emphasize enough is how uneven the season lengths were across the run. Seasons two through five hovered around twenty-four episodes. By season eight, they were down to about twenty. Season eleven, as I mentioned, was nine episodes. This matters if you are trying to calculate anything precise, like average episode length over time or budget per episode in inflation-adjusted dollars. The drop-off in episode count in the later seasons coincides with Alda's increasing creative control and the network's discomfort with the show's growing political edge, particularly after the Vietnam War ended in 1975. I ran into this exact problem once while tracking down production codes for a specific batch of episodes. The standard episode numbering systems diverge between seasons four and five because CBS reordered several episodes for different markets. If you pull data from a single source without checking the original air dates against the production order, you will mismatch episodes. My workaround was to cross-reference the CBS broadcast logs with the production code numbers and manually flag any episode where the production code suggested a later recording date but an earlier air date. It took about three hours for the entire series, but it saved me from publishing incorrect sequencing data.

The finale remains the most-watched single telecast in American television history at roughly 125 million viewers. It is worth noting that the show was never officially canceled. CBS kept renewing it year after year despite declining ratings, and the creators simply chose to end it on their own terms rather than let it decline further. That decision shaped everything about those final seasons, especially the tonal shift in season ten and the abbreviated eleventh. If you are looking at streaming availability or DVD releases, be aware that some international versions cut episodes differently. The UK broadcasts in particular trimmed several episodes down to approximately forty-minute slots, which means the episode count you see on certain platforms may not match the original one hundred and seventeen. Always check the production code rather than relying on the episode number listed on a streaming service page.