Fresh off its biggest shocker to date, Marvel's Agents of SHIELD has announced another surprise for viewers:

Cobie Smulders will soon reprise her beloved role as Agent Maria Hill, the character she portrayed in The Avengers and in Captain American 2, as well as on the SHIELD pilot.

According to TV Line, the How I Met Your Mother will stop by the April 29 installment of the ratings-challenged drama and play a “large role.”

Look for viewers to finally witness Coulson and Hill enjoying a lot of action-packed screen time together as well.

It has previously been reported, meanwhile, that Samuel L. Jackson will return as Nick Fury for the SHIELD finale on May 13.

To catch up on this series and determine whether it is worth saving, watch Agents of SHIELD online right here and now.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.