Question: When does season 4 or 5 of Warehouse 13 come back to Syfy?

Answer: The new episodes of Warehouse 13, season 4 are coming back to Syfy on Monday, April 29, 2013 at 10/9c.

Here is the official promo trailer for the return of Season 4 at the end of April:

Though some people are referring to these new episodes as season 5 or 4.5, their officially just the continuation of season 4.

This second part of the fourth series consists of 4 episodes: ‘The Living and the Dead’, ‘Parks and Rehabilitation’, ‘The Big Snag’ and ‘The Sky’s the Limit’. The season finale’s air date is set for May 20, 2013 on Syfy.