Episode 52
Michael was heading to visitation when he noticed Sparky got some duds. Michael chats with Lincoln who says that four more days was given to him. Lincoln tells him that they were not getting out of there alive and as Michael was absorbing all of this, you can see anger in him.
Michael and MBBM are chatting secretly. Michael was telling MBBM that the windows are being reinforced by the guards and he wanted to know if he can postpone this. As Henchman showed up Michael silently left the two to talk. Henchman was complaining about losing three people who belonged to the crew and he was requesting to take a large inmate.
Source: TV.com
Michael Scolfield created a very impressive plot of helping his brother get out of prison. Being a structural engineer, Scolfield carefully studied the whole Fox River Penitentiary area, from the buildings, entry and exit points, down to the sub-tunnels. The escape starts in his cell where he made a hole behind the toilet. This brings him to the prison tunnels that will eventually lead to the infirmary. The infirmary serves as the end point of the escape route. A thick wire was connected to the infirmary window directly to the main walls of the prison. Scolfield made sure that he brings with him the blue print of the whole prison as a guide in fulfilling his plans by tattooing it all over his upper body.

