<P> Michael Lembeck joined the series as Julie 's husband , Max , in the fifth season , but he was written out as a consequence of Phillips ' firing . ( But later returned in Season 7 along with Philips ) A steady stream of regulars was added in the ensuing seasons , including Ron Rifkin as Ann 's boyfriend , Nick ; Glenn Scarpelli as Nick 's son , Alex ; and Boyd Gaines as Barbara 's boyfriend , later husband , Mark . Shelley Fabares , who 'd previously guest starred as Ann 's rival co-worker Francine Webster , appeared more frequently , eventually becoming a regular . Nanette Fabray , who played Ann 's mother , also made more frequent appearances before becoming a regular cast member in the final season . Howard Hesseman joined the series for a short time as Mark 's father , Sam , who would become Ann 's second husband . </P>
<P> Michael Lembeck joined the series as Julie 's husband , Max , in the fifth season , but he was written out as a consequence of Phillips ' firing . ( But later returned in Season 7 along with Philips ) A steady stream of regulars was added in the ensuing seasons , including Ron Rifkin as Ann 's boyfriend , Nick ; Glenn Scarpelli as Nick 's son , Alex ; and Boyd Gaines as Barbara 's boyfriend , later husband , Mark . Shelley Fabares , who 'd previously guest starred as Ann 's rival co-worker Francine Webster , appeared more frequently , eventually becoming a regular . Nanette Fabray , who played Ann 's mother , also made more frequent appearances before becoming a regular cast member in the final season . Howard Hesseman joined the series for a short time as Mark 's father , Sam , who would become Ann 's second husband . </P>
who played the grandmother on one day at a time
who played the grandmother on one day at a time
Nanette Fabray
Nanette Fabray