Jagger achieved success in the television series Mr. Novak (1963–65) receiving Emmy Award nominations for his role in 1964 and 1965, as well as the California Teachers Association's Communications Award, along with star James Franciscus, in 1963 for his portrayal of high school principal Albert Vane.
However, even before he left the show to have a major medical operation, he was less than happy with the series, clashing repeatedly with the writers and directors and describing "the Mr. Novak company" afterwards as "a mishmash of unbelievable amateurishness."

"It is unforgivable how bad TV is today," he said in 1965. "
The people doing it have succumbed to the cliché that there is no time to be good in TV, or that we doing it are lucky to get one good episode out of three.
Why?"

Jagger officially left the show in December 1964 because of an ulcer.

Jagger's late 60s appearances included episodes of The F.B.I. and The Fugitive, as well as films First to Fight (1967), Firecreek (1968), Day of the Evil Gun (1968), Smith! (
1968) with Glenn Ford, The Lonely Profession (1969), Tiger by the Tail (1970), The Kremlin Letter (1970), Men at Law, The Brotherhood of the Bell (1970), again with Ford, and an episode of The Name of the Game.

He had a semi-regular role on the series Matt Lincoln (1970) as the father of the title character, and parts in Vanishing Point (1971), Bonanza, and Incident in San Francisco (1971).

In 1971, Jagger appeared on The Partridge Family.
He played a prospector named Charlie in the Christmas episode "Don't Bring Your Guns to Town, Santa".
Jagger achieved success in the television series Mr. Novak (1963–65) receiving Emmy Award nominations for his role in 1964 and 1965, as well as the California Teachers Association's Communications Award, along with star James Franciscus, in 1963 for his portrayal of high school principal Albert Vane. However, even before he left the show to have a major medical operation, he was less than happy with the series, clashing repeatedly with the writers and directors and describing "the Mr. Novak company" afterwards as "a mishmash of unbelievable amateurishness."
"It is unforgivable how bad TV is today," he said in 1965. "The people doing it have succumbed to the cliché that there is no time to be good in TV, or that we doing it are lucky to get one good episode out of three. Why?"
Jagger officially left the show in December 1964 because of an ulcer.
Jagger's late 60s appearances included episodes of The F.B.I. and The Fugitive, as well as films First to Fight (1967), Firecreek (1968), Day of the Evil Gun (1968), Smith! (1968) with Glenn Ford, The Lonely Profession (1969), Tiger by the Tail (1970), The Kremlin Letter (1970), Men at Law, The Brotherhood of the Bell (1970), again with Ford, and an episode of The Name of the Game.
He had a semi-regular role on the series Matt Lincoln (1970) as the father of the title character, and parts in Vanishing Point (1971), Bonanza, and Incident in San Francisco (1971).
In 1971, Jagger appeared on The Partridge Family. He played a prospector named Charlie in the Christmas episode "Don't Bring Your Guns to Town, Santa".
Dean Jagger