3rd Rock from the Sun - Season 6 - Eps 9: Dick Digs
When Dick accompanies Mary on an archeological dig, he is disappointed when the only thing he finds is a small pointed rock. Mary realizes, however, that it is an ancient spearhead and becomes upset, revealing that she has never found anything before. So, in order to make Mary happy, Dick steals a ceremonial wedding moon that was found the previous day and lays it for Mary to find. Meanwhile, the Rutherford Garlic Festival is on and Sally, Harry and Tommy decide to turn their attic apartment into a hotel, but things soon become hostile between them as they attempt to make their 'hotel' good enough to get a four star rating in the Crown Travel Guide.
About 3rd Rock from the Sun

Title: 3rd Rock from the Sun
First Air Date: 1996-01-09
Last Air Date: 2001-05-22
Status: Ended
Rating: 7.5/10 (from 503 votes)
Language: EN
Seasons: 6
Total Episodes: 139
Network: NBC
Genres: Family, Sci-Fi & Fantasy, Comedy, Drama
Production Companies: Carsey-Werner Company
Synopsis
The high commander of an alien expedition lands on Earth -- what he considers to be the least-important planet -- in human form as Dick Solomon. Along for the ride are his alien compatriots Harry, Sally and Tommy -- who is the eldest of the group but is now angrily trapped in a teen's body.
Cast

John Lithgow
Dick Solomon

Kristen Johnston
Sally Solomon

Jane Curtin
Mary Albright

Joseph Gordon-Levitt
Tommy Solomon

Elmarie Wendel
Mamie Dubcek

French Stewart
Harry Solomon

Simbi Khali
Nina Campbell

Wayne Knight
Don Orville