The "How I Met Your Mother" actress will reprise the role of SHIELD agent Maria Hill on the ABC series
"They had actually planned the ending during our pilot," the actress tells Letterman
The actress will appear on the ABC drama's final eight episodes of the season
Neither the laughs nor the sentimentality land as Vince Vaughn phones in another performance, this time as a frequent sperm donor who fathered hundreds of...
Iron Man and the Hulk also make appearance on video monitors in the background in a new clip from the ABC's new superhero drama
Another peak at what Joss Whedon has in store for viewers when ABC's "Avengers" spinoff premieres this fall
The Everyman truck driver finds out that he's the biological father of 533 kids after a mix-up at a fertility clinic
Christopher McDonald and Emily Bergl have also joined the cast of Stephen Gyllenhaal's political comedy