Patti Petersen was written into The cast of The Donna Reed Show as Trisha, an adopted child after Shelley Fabares left the series.

Patti Petersen was written into The cast of The Donna Reed Show as Trisha, an adopted child after Shelley Fabares left the series.

Patti Petersen was written into The cast of The Donna Reed Show as Trisha, an adopted child after Shelley Fabares left the series.

Patti Petersen Mirkovich appeared on The Donna Reed Show in the role of Trisha, an adopted child, after Shelly Fabares left the series.l

Patti Petersen co-starred on The Donna Reed Show. She was written into the cast as Trisha, an adopted child after Shelley Fabares left.