"Professor Jack"
Season Six, Episode #4
#104 in Series
Series: Three's Company
Network/Country: ABC-TV / USA
Air date October 27, 1981
Production code
Written by Laura Levine
Directed by: Dave Powers
IMDB IMDb logo Professor Jack
Cast Information
Starring: John Ritter
Joyce DeWitt
Priscilla Barnes
Don Knotts
Richard Kline
Jenilee Harrison
Guest stars: Frank Aletter ... as Tom Latham (Joanna's husband)
Sally Kemp ... as Joanna Latham
Paul Kent ... as Dr. Anderson
Episode guide
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Terri Makes Her Move Some of That Jazz
List of Three's Company episodes

Professor Jack is the fourth episode of Season 6 of Three's Company, and the 104th overall episode in the series. Written by Laura Levine, the episode was directed by Dave Powers. It first aired on ABC-TV on October 27, 1981.


Terri thinks an attractive older woman's visits to Jack are weekly lessons in lovemaking and, in disgust, decides to move out.


To help Jack earn some extra money, Janet arranges for Jack to teach the wife of someone she knows, a Mrs. Joanna Latham, how to cook. When Terri comes home from work at the hospital, she sees Mrs. Latham coming out of the bathroom, changing back into her clothes after "freshening up", as Mrs. Latham then tells her that Jack is "teaching her lessons", as she then mistakenly assumes Jack is giving her sex lessons!

So, to this end, Terri, flabbergasted at the prospect that Jack is giving paid "love lessons", she informs he and Janet that she's moving out. She then brings one of the doctors from the hospital, Dr. Anderson (Paul Kent) who wants to rent an apartment for his niece.

Jack and Janet assume that the man is going to "keep" Terri as as mistress at the newly vacant apartment! So, when the Dr. Anderson returns again the next day, after Jack finished giving another cooking lesson to Mrs. Latham, Jack and Janet try to come up with a plan to stop Terri from moving in what they thought was the doctor's "love nest"!

Meanwhile, when Mr. Latham (Frank Aletter) shows up just to simply observe Jack's cooking lessons he's giving his wife. Terri, still in the dark about the nature of the "lessons" Jack has been giving to his wife, talks to him and when he says he's there "to watch" she freaks out, and dumps on him a spaghetti-and-meatball dish that Jack helped Mrs. Latham prepare!

As for Dr. Anderson, when Janet, who along with Jack, is still in the dark as to why he would want to rent an apartment for whom they think is Terri, has a little talk with Terri, she, still thinking that she is having an affair with Dr. Anderson, whom she was trying to help decide which color paint was best to paint the new apartment, decides that "green is much better than blue" as she douses him with a can of green paint that he and Terri bought!

Finally, the whole misunderstanding about Jack's lessons and Dr. Anderson's renting an apartment for what turned out to be his niece is cleared up, as everyone laughs, except for Jack, now embarrassed that everyone was amused at the prospect of Jack being a paid gigolo!

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