"The Monster Among Us!"
Reed scans everyone's mind in order to establish a baseline to prevent any further mind control, but one of the Fantastic Four is not who they appear to be. The imposter sneaks into Reed's lab, but is discovered by Ben. Ben loses the imposter and goes out for a walk, where he runs into the Puppet Master, who tells him that they are all in danger, especially Alicia. Ben figures out who the imposter is and goes after Alicia. Only Reed knows what Ben's up to as Ben has to fight Johnny to get to Alicia, who is actually a Skrull.