Mackenzie Phillips Pat Harrington, Jr. on Mackenzie Phillips' personal problems during the run of One Day at a Time 03:47 Tabs Who talks about this person (active tab) Who talks about this person Pat Harrington, Jr. with Emerson CollegeView Interview Pat Harrington, Jr. on Mackenzie Phillips' personal problems during the run of One Day at a Time 03:47 Rita RiggsView Interview Rita Riggs on costuming Valerie Bertinelli and Mackenzie Phillips as "Barbara and Julie Cooper" on One Day at a Time, and on the process of costuming on a regular series 05:16