Agammemnon brings his band of brothers back from ancient Greece. Peabody and Sherman help history's first canine police force catch a gaseous criminal.
Sherman enters a cheer leading competition, but his attempts to get a newly formed squad ready disrupts Peabodyâ€TMs show about famous historical diseases.
Super fan Maria Garcia hosts the show when Peabody and Sherman get trapped inside Orchoptitron. Christine's meddling threatens to derail Mulan's destiny.
Peabody and Sherman celebrate historical lasts but their guests get lost in NYC, so Peabody must continue the show without the neighbors creating chaos.