Working quickly, and with a new batch of musicians, Dwyer returned in 2004 with a track on the SSSSSOSS cassette and the second OCS album, 2, for Narnack. Around this time both the Coachwhips and Zeigenbock Kopf disbanded and OCS became Dwyer's main band. He added saw player Patrick Mullins to the lineup and began work on another album of noisy psych-folk. OCS quickly released their third and fourth albums, Songs About Death Dying, Vol. 3 and OCS4: Get Stoved, as a double CD in 2005, again on Narnack. Around this time, Brigid Dawson, a friend of Dwyer's and member of the duo Mix Tapes, joined the band and they changed their name to Thee Oh Sees for their next album, 2006's The Cool Death of the Island Raiders, which retained much of the freak folk air of OCS' work. Over the next decade-plus, Dwyer operated under permutations of the Oh Sees name, cranking out numerous albums of ferocious garage punk, while playing shows that left both band and audience drenched in sweat.
In 2017, Dwyer brought back the OCS name for an album of delicate and weird psych-folk that felt like an update on the lo-fi sound of past recordings. He teamed with Dawson in the writing process and early stages of recording, then brought back Mullins to add saw and electronics, a string section with arrangements written by Heather Lockie, and occasional horns under the guidance of Mikal Cronin. Memory of a Cut Off Head was released by Dwyer's Castle Face label in late 2017. ~ Tim Sendra, Rovi