His last acting role was in the television series Lois & Clark: The New Adventures of Superman ( Season 1, Episode 9, originally aired on November 21, 1993 ), in which he played the Mayor Frank Berkowitz.

* On July 30, 2009, a Broadway-style dance version of " Send in the Clowns ", choreographed by Tyce Diorio, was shown to open So You Think You Can Dance ( Season 5 Episode 21 ) Top 6 Results.

* May 21 – Star Wars Episode V: The Empire Strikes Back is released.

* Episode 21: " Sticky Wicket " ( Teleplay with Laurence Marks )

* Episode 21: " Crisis " ( Written with Laurence Marks )

* Episode 21: " Smilin ' Jack " ( Written with Simon Muntner )

* Star Wars Episode V: The Empire Strikes Back ( May 21, 1980 )

Descriptions of how the Chronosphere and the time travel mechanisms work were revealed in the early episodes, and in episodes where Russian time travelers or spies attempt to steal Element-115 or the secrets of the Backstep Project ( for example, in Season 3, Episode 21 – " Born in the USSR " and in Season 1, Episode 9 – " As Time Goes By ").

However, in another episode – Season 3, Episode 21, " Born in the USSR " – the Soviets mentioned that they encountered a mathematical limitation of the time travel mechanism that they were working on, in which it would appear that time travel is limited to only seven days to the past, and nothing more than that.

In the final episode of the first season ( Episode 21, " Lifeboat "), it was revealed that the Roswell crash was actually an alien craft transporting convicts to a penal colony in another solar system when it developed a malfunction and crash-landed on Earth.

This was revealed in the first season finale in which the alien Adam was aware of the timelines before and after Parker's Backstep ( Season 1, Episode 21 – " Lifeboat ").

In two episodes ( Season 1, Episode 9 – " As Time Goes By " and Season 3, Episode 21 – " Born in the USSR "), it was shown that the Russians had their own time travel projects.

The Soviet time travel project also had possession of Element-115 from a similar alien craft crash in Siberia ( Season 3, Episode 21 – " Born in the USSR ").

*" Prom Theme " – Joan of Arcadia ( The Uncertainty Principle ), Gossip Girl ( Episode 2. 21 )

# Episode 3 ( 21 September 1989 )

# Episode 1 ( 21 February 1992 )

* June 21 – Patrick Troughton makes his last regular appearance as the Second Doctor in the concluding moments of Episode 10 of the Doctor Who serial The War Games.

* The Rat Patrol-Season 1, Episode 21 ' The B Negative Raid ', Guest Star ( 1967 )

* Episode 21 Hogan's Heroes

* Episode 21 The Partridge Family

* Episode 21 Lost in Space

* The Judy Garland Show – Episode # 21 ( 1964 )

* The Flip Wilson Show ( NBC, Season 3, Episode 7, November 21, 1972 )

Episode 7: Gone a ' Hunting

" He joined the main cast of CSI: Miami which premiered in 2002 and directed and wrote the episode " Hunting Ground " ( Season 9 Episode 16 ).

* Episode 21: " A Hunting We Won't Go "

* Episode 1: " Divided We Stand " ( Written )

In 1976 she appeared as Ernestine in a parody of a commercial on Saturday Night Live ( Season 2 Episode 1, September 18, 1976 ), in which she proclaimed, " We don't care, we don't have to ... we're the phone company.

In Season Five Episode 14 of Gilmore Girls Lorelai calls Luke after they've broken up and tells him that she was thinking about " The Way We Were " and reminded him of how Katie called Hubbell after they'd broken up and asked him to come sit with her because he was her best friend and she needed her best friend.

* John Ross's life and the Trail of Tears are dramatized in Episode 3 of the Ric Burns " American Experience " documentary, We Shall Remain ( 2009 ).

" Address also appears in a letter approving citizenship of Dominika House in season 8, Episode 17: " We need the eggs ".

* Slattery's People ( 1965 ) Episode: Question: When Do We Hang The Good Samaritan?

It was featured on Season 2 Episode 15 of Nip / Tuck as was " All We Are " on Season 3, Episode 1.

* Episode 7: " Mind If We Join Your Wedding "

We learn in Episode 14 that he keeps promising to take Ethel out, but never does.

* Best Actress in a Leading Role in a Television Drama ( 2000 ) in Something in the Air ( Episode :" We will remember them ")

* Bop It appeared in the TV series Gilmore Girls, where it was referred to by Lorelai and Rory, and used in the episode " We Got Us a Pippi Virgin " ( Season 5, Episode 5 ) as Lorelai explains that Bop It is what they bring out in social situations that " need mouth-to-mouth resuscitation ", and with which Luke takes on Dean.

Frank Gottlieb, in ' We Like Mike ' ( Season 7, Episode 20 ); Mr. Stephens, in ' True North ' ( Season 9, Episode 9 ); Howard, Ridgeway in ' Maritime ' ( Season 13, Episode 18 ); and Jim Gilles, in ' Political Animal ' ( Season 18, Episode 6 ).

* Episode 5-John Maynard Keynes: What Did We learn from the Great Depression?

* Episode 6-Fiscal Policy: Can We Control the Economy?

* Episode 10-Stagflation: Why Couldn't We Beat It?

* Episode 11-Productivity: Can We Get More For Less?

* Episode 12-Federal Deficits: Can We Live With Them?

* Episode 14-Stabilization Policy: Are We Still In Control?

* Episode 15-The Firm: How Can We Keep Costs Down?