Jack and Chrissy agree to take over Janet's babysitting job for a night. To their dismay, they are met with a crying baby, no TV, and a locked liquor cabinet.
The roommates plan a dinner for the Ropers, but their evening is ruined when a blind guy whom Jack knew in the Navy shows up. He won't leave until Jack hits him.
A woman claiming to be Jack's girlfriend tells Janet and Chrissy that she is pregnant. After they confront him, Jack proposes to his girlfriend who Janet and Chrissy later find out is a different girl.
The roommates clean up the Ropers' garden and give some weeds to Mrs. Roper to use in her flower arranging class. They later discover that the weeds are marijuana plants.
Jack and Chrissy take turns sucking up to Janet who has acquired a pair of Frank Sinatra tickets. Th roommates are also entrusted to take care of a parakeet that Mr. Roper bought as a gift for his wife.
An old flame who broke Jack's heart shows up unexpectedly. Chrissy attempts to persuade Jack to leave the girl to get him to his surprise birthday party at the Ropers'.
Chrissy gets a job typing out an X-rated diary for a client. Things get complicated when Mr. Roper sneaks a peek and assumes that the diary is about Chrissy and her secret lust for the "older man downstairs".
Mr. Roper is not getting along with his best friend Jerry. Jack, Janet, Chrissy, and Jerry all get the wrong idea when Mrs. Roper asks to use their apartment to talk to Jerry privately.
Jack takes Janet's visiting sister around town but Janet gets angry when he accidentally slips into bed with her in the middle of the night in a sleepy error.
